ColorSchemes: Adds more color schemes and text colors that depend on the background (#28305)

* Adding more color modes and text colors that depend on the background color

* Updates

* Updated

* Another big value fix

* Fixing unit tests

* Updated

* Updated test

* Update

* Updated

* Updated

* Updated

* Updated

* Added new demo dashboard

* Updated

* updated

* Updated

* Updateed

* added beta notice

* Fixed e2e test

devenv/dev-dashboards/panel-common/color_modes.json

@@ -0,0 +1,338 @@
+{
+  "annotations": {
+    "list": [
+      {
+        "builtIn": 1,
+        "datasource": "-- Grafana --",
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "type": "dashboard"
+      }
+    ]
+  },
+  "editable": true,
+  "gnetId": null,
+  "graphTooltip": 0,
+  "links": [],
+  "panels": [
+    {
+      "datasource": "gdev-testdata",
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "continuous-BlYlRd"
+          },
+          "custom": {
+            "align": "center",
+            "displayMode": "color-background",
+            "filterable": false
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "percentage",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "blue",
+                "value": 20
+              },
+              {
+                "color": "orange",
+                "value": 60
+              },
+              {
+                "color": "red",
+                "value": 70
+              }
+            ]
+          },
+          "unit": "degree"
+        },
+        "overrides": [
+          {
+            "matcher": {
+              "id": "byName",
+              "options": "Field"
+            },
+            "properties": [
+              {
+                "id": "custom.displayMode"
+              }
+            ]
+          }
+        ]
+      },
+      "gridPos": {
+        "h": 16,
+        "w": 19,
+        "x": 0,
+        "y": 0
+      },
+      "id": 4,
+      "options": {
+        "showHeader": true,
+        "sortBy": [
+          {
+            "desc": true,
+            "displayName": "Last"
+          }
+        ]
+      },
+      "pluginVersion": "7.4.0-pre",
+      "targets": [
+        {
+          "alias": "",
+          "csvWave": {
+            "timeStep": 60,
+            "valuesCSV": "0,0,2,2,1,1"
+          },
+          "lines": 10,
+          "points": [],
+          "pulseWave": {
+            "offCount": 3,
+            "offValue": 1,
+            "onCount": 3,
+            "onValue": 2,
+            "timeStep": 60
+          },
+          "refId": "A",
+          "scenarioId": "random_walk",
+          "seriesCount": 15,
+          "stream": {
+            "bands": 1,
+            "noise": 2.2,
+            "speed": 250,
+            "spread": 3.5,
+            "type": "signal"
+          },
+          "stringInput": ""
+        }
+      ],
+      "timeFrom": null,
+      "timeShift": null,
+      "title": "Gradient color schemes",
+      "transformations": [
+        {
+          "id": "reduce",
+          "options": {
+            "reducers": ["max", "mean", "last", "min"]
+          }
+        },
+        {
+          "id": "organize",
+          "options": {
+            "excludeByName": {
+              "Field": false
+            },
+            "indexByName": {},
+            "renameByName": {}
+          }
+        }
+      ],
+      "type": "table"
+    },
+    {
+      "datasource": null,
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "continuous-blues"
+          },
+          "custom": {},
+          "mappings": [],
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "red",
+                "value": 20
+              }
+            ]
+          }
+        },
+        "overrides": []
+      },
+      "gridPos": {
+        "h": 26,
+        "w": 5,
+        "x": 19,
+        "y": 0
+      },
+      "id": 2,
+      "options": {
+        "colorMode": "background",
+        "graphMode": "none",
+        "justifyMode": "auto",
+        "orientation": "auto",
+        "reduceOptions": {
+          "calcs": ["mean"],
+          "fields": "",
+          "values": false
+        },
+        "textMode": "value"
+      },
+      "pluginVersion": "7.4.0-pre",
+      "targets": [
+        {
+          "alias": "",
+          "csvWave": {
+            "timeStep": 60,
+            "valuesCSV": "0,0,2,2,1,1"
+          },
+          "labels": "",
+          "lines": 10,
+          "points": [],
+          "pulseWave": {
+            "offCount": 3,
+            "offValue": 1,
+            "onCount": 3,
+            "onValue": 2,
+            "timeStep": 60
+          },
+          "refId": "A",
+          "scenarioId": "random_walk",
+          "seriesCount": 30,
+          "stream": {
+            "bands": 1,
+            "noise": 2.2,
+            "speed": 250,
+            "spread": 3.5,
+            "type": "signal"
+          },
+          "stringInput": ""
+        }
+      ],
+      "timeFrom": null,
+      "timeShift": null,
+      "title": "Stats",
+      "type": "stat"
+    },
+    {
+      "datasource": "gdev-testdata",
+      "fieldConfig": {
+        "defaults": {
+          "color": {
+            "mode": "continuous-GrYlRd"
+          },
+          "custom": {
+            "align": "center",
+            "displayMode": "color-background",
+            "filterable": false
+          },
+          "mappings": [],
+          "thresholds": {
+            "mode": "percentage",
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "blue",
+                "value": 20
+              },
+              {
+                "color": "orange",
+                "value": 60
+              },
+              {
+                "color": "red",
+                "value": 70
+              }
+            ]
+          },
+          "unit": "degree"
+        },
+        "overrides": [
+          {
+            "matcher": {
+              "id": "byName",
+              "options": "Field"
+            },
+            "properties": [
+              {
+                "id": "custom.displayMode"
+              }
+            ]
+          }
+        ]
+      },
+      "gridPos": {
+        "h": 10,
+        "w": 19,
+        "x": 0,
+        "y": 16
+      },
+      "id": 5,
+      "options": {
+        "displayMode": "lcd",
+        "orientation": "auto",
+        "reduceOptions": {
+          "calcs": ["mean"],
+          "fields": "",
+          "values": false
+        },
+        "showUnfilled": true
+      },
+      "pluginVersion": "7.4.0-pre",
+      "targets": [
+        {
+          "alias": "",
+          "csvWave": {
+            "timeStep": 60,
+            "valuesCSV": "0,0,2,2,1,1"
+          },
+          "lines": 10,
+          "points": [],
+          "pulseWave": {
+            "offCount": 3,
+            "offValue": 1,
+            "onCount": 3,
+            "onValue": 2,
+            "timeStep": 60
+          },
+          "refId": "A",
+          "scenarioId": "random_walk",
+          "seriesCount": 15,
+          "stream": {
+            "bands": 1,
+            "noise": 2.2,
+            "speed": 250,
+            "spread": 3.5,
+            "type": "signal"
+          },
+          "stringInput": ""
+        }
+      ],
+      "timeFrom": null,
+      "timeShift": null,
+      "title": "Bar Gauge LCD",
+      "transformations": [],
+      "type": "bargauge"
+    }
+  ],
+  "schemaVersion": 26,
+  "style": "dark",
+  "tags": ["gdev", "demo"],
+  "templating": {
+    "list": []
+  },
+  "time": {
+    "from": "now-6h",
+    "to": "now"
+  },
+  "timepicker": {},
+  "timezone": "",
+  "title": "Gradient Color modes",
+  "uid": "inxsweKGz",
+  "version": 17
+}

e2e/suite1/specs/templating-dashboard-links-and-variables.ts

@@ -29,7 +29,7 @@ e2e.scenario({
       e2e.components.DashboardLinks.link()
         .should('be.visible')
         .and(links => {
-          expect(links).to.have.length(13);
+          expect(links).to.have.length.greaterThan(13);
 
           for (let index = 0; index < links.length; index++) {
             expect(Cypress.$(links[index]).attr('href')).contains(`var-custom=${variableValue}`);

packages/grafana-data/src/field/displayProcessor.ts

@@ -3,13 +3,14 @@ import _ from 'lodash';
 
 // Types
 import { Field, FieldType } from '../types/dataFrame';
-import { GrafanaTheme, GrafanaThemeType } from '../types/theme';
+import { GrafanaTheme } from '../types/theme';
 import { DecimalCount, DecimalInfo, DisplayProcessor, DisplayValue } from '../types/displayValue';
 import { getValueFormat } from '../valueFormats/valueFormats';
 import { getMappedValue } from '../utils/valueMappings';
 import { dateTime } from '../datetime';
 import { KeyValue, TimeZone } from '../types';
 import { getScaleCalculator } from './scale';
+import { getTestTheme } from '../utils/testdata/testTheme';
 
 interface DisplayProcessorOptions {
   field: Partial<Field>;
@@ -41,7 +42,7 @@ export function getDisplayProcessor(options?: DisplayProcessorOptions): DisplayP
   const config = field.config ?? {};
 
   // Theme should be required or we need access to default theme instance from here
-  const theme = options.theme ?? ({ type: GrafanaThemeType.Dark } as GrafanaTheme);
+  const theme = options.theme ?? getTestTheme();
 
   let unit = config.unit;
   let hasDateUnit = unit && (timeFormats[unit] || unit.startsWith('time:'));

packages/grafana-data/src/field/fieldColor.test.ts

@@ -1,4 +1,5 @@
-import { Field, GrafanaThemeType, GrafanaTheme, FieldColorModeId } from '../types';
+import { Field, FieldColorModeId } from '../types';
+import { getTestTheme } from '../utils/testdata/testTheme';
 import { fieldColorModeRegistry, FieldValueColorCalculator } from './fieldColor';
 
 describe('fieldColorModeRegistry', () => {
@@ -9,10 +10,7 @@ describe('fieldColorModeRegistry', () => {
 
   function getCalculator(options: GetCalcOptions): FieldValueColorCalculator {
     const mode = fieldColorModeRegistry.get(options.mode);
-    return mode.getCalculator(
-      { state: { seriesIndex: options.seriesIndex } } as Field,
-      { type: GrafanaThemeType.Dark } as GrafanaTheme
-    );
+    return mode.getCalculator({ state: { seriesIndex: options.seriesIndex } } as Field, getTestTheme());
   }
 
   it('Schemes should interpolate', () => {

packages/grafana-data/src/field/fieldColor.ts

@@ -54,20 +54,81 @@ export const fieldColorModeRegistry = new Registry<FieldColorMode>(() => {
     // }),
     new FieldColorSchemeMode({
       id: FieldColorModeId.PaletteClassic,
-      name: 'By series / Classic palette',
-      //description: 'Assigns color based on series or field index',
+      name: 'Classic palette',
       isContinuous: false,
       isByValue: false,
       colors: classicColors,
     }),
     new FieldColorSchemeMode({
       id: 'continuous-GrYlRd',
-      name: 'By value / Green Yellow Red (gradient)',
-      //description: 'Interpolated colors based value, min and max',
+      name: 'Green-Yellow-Red',
       isContinuous: true,
       isByValue: true,
       colors: ['green', 'yellow', 'red'],
     }),
+    new FieldColorSchemeMode({
+      id: 'continuous-BlYlRd',
+      name: 'Blue-Yellow-Red',
+      isContinuous: true,
+      isByValue: true,
+      colors: ['dark-blue', 'super-light-yellow', 'dark-red'],
+    }),
+    new FieldColorSchemeMode({
+      id: 'continuous-RdYlBl',
+      name: 'Red-Yellow-Blue',
+      isContinuous: true,
+      isByValue: true,
+      colors: ['dark-red', 'super-light-yellow', 'dark-blue'],
+    }),
+    new FieldColorSchemeMode({
+      id: 'continuous-YlRd',
+      name: 'Yellow-Red',
+      isContinuous: true,
+      isByValue: true,
+      colors: ['super-light-yellow', 'dark-red'],
+    }),
+    new FieldColorSchemeMode({
+      id: 'continuous-BlPu',
+      name: 'Blue-Purple',
+      isContinuous: true,
+      isByValue: true,
+      colors: ['blue', 'purple'],
+    }),
+    new FieldColorSchemeMode({
+      id: 'continuous-YlBl',
+      name: 'Yellow-Blue',
+      isContinuous: true,
+      isByValue: true,
+      colors: ['super-light-yellow', 'dark-blue'],
+    }),
+    new FieldColorSchemeMode({
+      id: 'continuous-blues',
+      name: 'Blues',
+      isContinuous: true,
+      isByValue: true,
+      colors: ['panel-bg', 'dark-blue'],
+    }),
+    new FieldColorSchemeMode({
+      id: 'continuous-reds',
+      name: 'Reds',
+      isContinuous: true,
+      isByValue: true,
+      colors: ['panel-bg', 'dark-red'],
+    }),
+    new FieldColorSchemeMode({
+      id: 'continuous-greens',
+      name: 'Greens',
+      isContinuous: true,
+      isByValue: true,
+      colors: ['panel-bg', 'dark-green'],
+    }),
+    new FieldColorSchemeMode({
+      id: 'continuous-purples',
+      name: 'Purples',
+      isContinuous: true,
+      isByValue: true,
+      colors: ['panel-bg', 'dark-purple'],
+    }),
   ];
 });
 

packages/grafana-data/src/field/fieldDisplay.test.ts

@@ -2,9 +2,9 @@ import merge from 'lodash/merge';
 import { getFieldDisplayValues, GetFieldDisplayValuesOptions } from './fieldDisplay';
 import { toDataFrame } from '../dataframe/processDataFrame';
 import { ReducerID } from '../transformations/fieldReducer';
-import { GrafanaTheme } from '../types/theme';
 import { MappingType } from '../types';
 import { standardFieldConfigEditorRegistry } from './standardFieldConfigEditorRegistry';
+import { getTestTheme } from '../utils/testdata/testTheme';
 
 describe('FieldDisplay', () => {
   beforeAll(() => {
@@ -241,7 +241,7 @@ function createDisplayOptions(extend: Partial<GetFieldDisplayValuesOptions> = {}
       overrides: [],
       defaults: {},
     },
-    theme: {} as GrafanaTheme,
+    theme: getTestTheme(),
   };
 
   return merge<GetFieldDisplayValuesOptions, any>(options, extend);

packages/grafana-data/src/field/fieldOverrides.test.ts

@@ -15,7 +15,6 @@ import {
   FieldConfigPropertyItem,
   FieldConfigSource,
   FieldType,
-  GrafanaTheme,
   InterpolateFunction,
   ThresholdsMode,
   FieldColorModeId,
@@ -28,6 +27,7 @@ import { FieldConfigOptionsRegistry } from './FieldConfigOptionsRegistry';
 import { getFieldDisplayName } from './fieldState';
 import { ArrayVector } from '../vector';
 import { getDisplayProcessor } from './displayProcessor';
+import { getTestTheme } from '../utils/testdata/testTheme';
 
 const property1: any = {
   id: 'custom.property1', // Match field properties
@@ -136,7 +136,7 @@ describe('applyFieldOverrides', () => {
         },
         replaceVariables: (value: any) => value,
         getDataSourceSettingsByUid: undefined as any,
-        theme: {} as GrafanaTheme,
+        theme: getTestTheme(),
         fieldConfigRegistry: new FieldConfigOptionsRegistry(),
       });
 
@@ -199,7 +199,7 @@ describe('applyFieldOverrides', () => {
       fieldConfigRegistry: customFieldRegistry,
       getDataSourceSettingsByUid: undefined as any,
       replaceVariables: v => v,
-      theme: {} as GrafanaTheme,
+      theme: getTestTheme(),
     })[0];
 
     const outField = processed.fields[0];
@@ -216,7 +216,7 @@ describe('applyFieldOverrides', () => {
       fieldConfig: src as FieldConfigSource, // defaults + overrides
       replaceVariables: (undefined as any) as InterpolateFunction,
       getDataSourceSettingsByUid: undefined as any,
-      theme: (undefined as any) as GrafanaTheme,
+      theme: getTestTheme(),
       fieldConfigRegistry: customFieldRegistry,
     })[0];
     const valueColumn = data.fields[1];
@@ -244,7 +244,7 @@ describe('applyFieldOverrides', () => {
       fieldConfig: src as FieldConfigSource, // defaults + overrides
       replaceVariables: (undefined as any) as InterpolateFunction,
       getDataSourceSettingsByUid: undefined as any,
-      theme: (undefined as any) as GrafanaTheme,
+      theme: getTestTheme(),
       autoMinMax: true,
     })[0];
     const valueColumn = data.fields[1];
@@ -268,7 +268,7 @@ describe('applyFieldOverrides', () => {
         return value;
       }) as InterpolateFunction,
       getDataSourceSettingsByUid: undefined as any,
-      theme: (undefined as any) as GrafanaTheme,
+      theme: getTestTheme(),
       autoMinMax: true,
       fieldConfigRegistry: customFieldRegistry,
     })[0];
@@ -521,7 +521,7 @@ describe('getLinksSupplier', () => {
       // this is used only for internal links so isn't needed here
       () => ({} as any),
       {
-        theme: {} as GrafanaTheme,
+        theme: getTestTheme(),
       }
     );
     supplier({});
@@ -568,7 +568,7 @@ describe('getLinksSupplier', () => {
       // We do not need to interpolate anything for this test
       (value, vars, format) => value,
       uid => ({ name: 'testDS' } as any),
-      { theme: {} as GrafanaTheme }
+      { theme: getTestTheme() }
     );
     const links = supplier({ valueRowIndex: 0 });
     expect(links.length).toBe(1);

packages/grafana-data/src/field/getFieldDisplayValuesProxy.test.tsx

@@ -2,6 +2,7 @@ import { getFieldDisplayValuesProxy } from './getFieldDisplayValuesProxy';
 import { applyFieldOverrides } from './fieldOverrides';
 import { toDataFrame } from '../dataframe';
 import { GrafanaTheme } from '../types';
+import { getTestTheme } from '../utils/testdata/testTheme';
 
 describe('getFieldDisplayValuesProxy', () => {
   const data = applyFieldOverrides({
@@ -30,7 +31,7 @@ describe('getFieldDisplayValuesProxy', () => {
     replaceVariables: (val: string) => val,
     getDataSourceSettingsByUid: (val: string) => ({} as any),
     timeZone: 'utc',
-    theme: {} as GrafanaTheme,
+    theme: getTestTheme(),
     autoMinMax: true,
   })[0];
 

packages/grafana-data/src/field/scale.test.ts

@@ -1,7 +1,8 @@
-import { ThresholdsMode, Field, FieldType, GrafanaThemeType, GrafanaTheme } from '../types';
+import { ThresholdsMode, Field, FieldType } from '../types';
 import { sortThresholds } from './thresholds';
 import { ArrayVector } from '../vector/ArrayVector';
 import { getScaleCalculator } from './scale';
+import { getTestTheme } from '../utils/testdata/testTheme';
 
 describe('getScaleCalculator', () => {
   it('should return percent, threshold and color', () => {
@@ -18,7 +19,7 @@ describe('getScaleCalculator', () => {
       values: new ArrayVector([0, 50, 100]),
     };
 
-    const calc = getScaleCalculator(field, { type: GrafanaThemeType.Dark } as GrafanaTheme);
+    const calc = getScaleCalculator(field, getTestTheme());
     expect(calc(70)).toEqual({
       percent: 0.7,
       threshold: thresholds[1],

packages/grafana-data/src/utils/namedColorsPalette.ts

@@ -34,7 +34,8 @@ export type Color =
   | 'dark-purple'
   | 'semi-dark-purple'
   | 'light-purple'
-  | 'super-light-purple';
+  | 'super-light-purple'
+  | 'panel-bg';
 
 type ThemeVariants = {
   dark: string;
@@ -82,6 +83,8 @@ export function buildColorsMapForTheme(theme: GrafanaTheme): Record<Color, strin
     }
   }
 
+  colorsMap['panel-bg'] = theme.colors.panelBg;
+
   return colorsMap;
 }
 
@@ -118,7 +121,25 @@ export function getColorForTheme(color: string, theme: GrafanaTheme): string {
 export function getColorFromHexRgbOrName(color: string, type?: GrafanaThemeType): string {
   const themeType = type ?? GrafanaThemeType.Dark;
 
-  return getColorForTheme(color, ({ type: themeType } as unknown) as GrafanaTheme);
+  if (themeType === GrafanaThemeType.Dark) {
+    const darkTheme = ({
+      type: themeType,
+      colors: {
+        panelBg: '#141619',
+      },
+    } as unknown) as GrafanaTheme;
+
+    return getColorForTheme(color, darkTheme);
+  }
+
+  const lightTheme = ({
+    type: themeType,
+    colors: {
+      panelBg: '#000000',
+    },
+  } as unknown) as GrafanaTheme;
+
+  return getColorForTheme(color, lightTheme);
 }
 
 const buildNamedColorsPalette = () => {

packages/grafana-data/src/utils/testdata/testTheme.ts

@@ -0,0 +1,12 @@
+import { GrafanaTheme, GrafanaThemeType } from '../../types/theme';
+
+export function getTestTheme(type: GrafanaThemeType = GrafanaThemeType.Dark): GrafanaTheme {
+  return ({
+    type,
+    isDark: type === GrafanaThemeType.Dark,
+    isLight: type === GrafanaThemeType.Light,
+    colors: {
+      panelBg: 'white',
+    },
+  } as unknown) as GrafanaTheme;
+}

packages/grafana-ui/src/components/BigValue/BigValueLayout.tsx

@@ -9,6 +9,7 @@ import { calculateFontSize } from '../../utils/measureText';
 
 // Types
 import { BigValueColorMode, Props, BigValueJustifyMode, BigValueTextMode } from './BigValue';
+import { getTextColorForBackground } from '../../utils';
 
 const LINE_HEIGHT = 1.2;
 const MAX_TITLE_SIZE = 30;
@@ -51,7 +52,7 @@ export abstract class BigValueLayout {
     };
 
     if (this.props.colorMode === BigValueColorMode.Background) {
-      styles.color = 'white';
+      styles.color = getTextColorForBackground(this.valueColor);
     }
 
     return styles;
@@ -69,7 +70,7 @@ export abstract class BigValueLayout {
         styles.color = this.valueColor;
         break;
       case BigValueColorMode.Background:
-        styles.color = 'white';
+        styles.color = getTextColorForBackground(this.valueColor);
     }
 
     return styles;

packages/grafana-ui/src/components/BigValue/__snapshots__/BigValue.test.tsx.snap

@@ -30,7 +30,7 @@ exports[`BigValue Render with basic options should render 1`] = `
     <FormattedDisplayValue
       style={
         Object {
-          "color": "white",
+          "color": "#202226",
           "fontSize": 230,
           "fontWeight": 500,
           "lineHeight": 1.2,

packages/grafana-ui/src/components/OptionsUI/fieldColor.tsx

@@ -23,9 +23,11 @@ export const FieldColorEditor: React.FC<FieldConfigEditorProps<FieldColor | unde
   const styles = useStyles(getStyles);
 
   const options = fieldColorModeRegistry.list().map(mode => {
+    let suffix = mode.isByValue ? ' (by value)' : '';
+
     return {
       value: mode.id,
-      label: mode.name,
+      label: `${mode.name}${suffix}`,
       description: mode.description,
       isContinuous: mode.isContinuous,
       isByValue: mode.isByValue,

packages/grafana-ui/src/components/Table/DefaultCell.tsx

@@ -5,6 +5,7 @@ import { TableCellDisplayMode, TableCellProps } from './types';
 import tinycolor from 'tinycolor2';
 import { TableStyles } from './styles';
 import { FilterActions } from './FilterActions';
+import { getTextColorForBackground } from '../../utils';
 
 export const DefaultCell: FC<TableCellProps> = props => {
   const { field, cell, tableStyles, row, cellProps } = props;
@@ -65,7 +66,12 @@ function getCellStyle(tableStyles: TableStyles, field: Field, displayValue: Disp
       .spin(5)
       .toRgbString();
 
-    return tableStyles.buildCellContainerStyle('white', `linear-gradient(120deg, ${bgColor2}, ${displayValue.color})`);
+    const textColor = getTextColorForBackground(displayValue.color!);
+
+    return tableStyles.buildCellContainerStyle(
+      textColor,
+      `linear-gradient(120deg, ${bgColor2}, ${displayValue.color})`
+    );
   }
 
   return tableStyles.cellContainer;

packages/grafana-ui/src/utils/colors.ts

@@ -4,6 +4,8 @@ import flattenDeep from 'lodash/flattenDeep';
 import chunk from 'lodash/chunk';
 import zip from 'lodash/zip';
 import tinycolor from 'tinycolor2';
+import lightTheme from '../themes/light';
+import darkTheme from '../themes/dark';
 
 export const PALETTE_ROWS = 4;
 export const PALETTE_COLUMNS = 14;
@@ -93,4 +95,9 @@ function hslToHex(color: any) {
   return tinycolor(color).toHexString();
 }
 
+export function getTextColorForBackground(color: string) {
+  const b = tinycolor(color).getBrightness();
+  return b > 150 ? lightTheme.colors.textStrong : darkTheme.colors.textStrong;
+}
+
 export let sortedColors = sortColorsByHue(colors);

packages/grafana-ui/src/utils/measureText.ts

@@ -1,6 +1,9 @@
 let canvas: HTMLCanvasElement | null = null;
 const cache: Record<string, TextMetrics> = {};
 
+/**
+ * @beta
+ */
 export function measureText(text: string, fontSize: number): TextMetrics {
   const fontStyle = `${fontSize}px 'Roboto'`;
   const cacheKey = text + fontStyle;
@@ -26,6 +29,9 @@ export function measureText(text: string, fontSize: number): TextMetrics {
   return metrics;
 }
 
+/**
+ * @beta
+ */
 export function calculateFontSize(text: string, width: number, height: number, lineHeight: number, maxSize?: number) {
   // calculate width in 14px
   const textSize = measureText(text, 14);

public/app/features/panel/panellinks/linkSuppliers.test.ts

@@ -1,8 +1,9 @@
 import { getFieldLinksSupplier } from './linkSuppliers';
-import { applyFieldOverrides, DataFrameView, dateTime, FieldDisplay, GrafanaTheme, toDataFrame } from '@grafana/data';
+import { applyFieldOverrides, DataFrameView, dateTime, FieldDisplay, toDataFrame } from '@grafana/data';
 import { getLinkSrv, LinkService, LinkSrv, setLinkSrv } from './link_srv';
 import { TemplateSrv } from '../../templating/template_srv';
 import { TimeSrv } from '../../dashboard/services/TimeSrv';
+import { getTheme } from '@grafana/ui';
 
 describe('getFieldLinksSupplier', () => {
   let originalLinkSrv: LinkService;
@@ -91,7 +92,7 @@ describe('getFieldLinksSupplier', () => {
       replaceVariables: (val: string) => val,
       getDataSourceSettingsByUid: (val: string) => ({} as any),
       timeZone: 'utc',
-      theme: {} as GrafanaTheme,
+      theme: getTheme(),
       autoMinMax: true,
     })[0];
 

public/app/plugins/panel/table-old/specs/renderer.test.ts

@@ -3,7 +3,7 @@ import TableModel from 'app/core/table_model';
 import { TableRenderer } from '../renderer';
 import { ScopedVars, TimeZone } from '@grafana/data';
 import { ColumnRender } from '../types';
-import { config } from 'app/core/config';
+import { getTheme } from '@grafana/ui';
 
 const utc: TimeZone = 'utc';
 
@@ -211,7 +211,7 @@ describe('when rendering table', () => {
     };
 
     //@ts-ignore
-    const renderer = new TableRenderer(panel, table, utc, sanitize, templateSrv, config.theme);
+    const renderer = new TableRenderer(panel, table, utc, sanitize, templateSrv, getTheme());
 
     it('time column should be formatted', () => {
       const html = renderer.renderCell(0, 0, 1388556366666);
@@ -467,7 +467,7 @@ describe('when rendering table with different patterns', () => {
       };
 
       //@ts-ignore
-      const renderer = new TableRenderer(panel, table, utc, sanitize, templateSrv);
+      const renderer = new TableRenderer(panel, table, utc, sanitize, templateSrv, getTheme());
       const html = renderer.renderCell(1, 0, 1230);
 
       expect(html).toBe(expected);
@@ -537,7 +537,7 @@ describe('when rendering cells with different alignment options', () => {
       };
 
       //@ts-ignore
-      const renderer = new TableRenderer(panel, table, utc, sanitize, templateSrv);
+      const renderer = new TableRenderer(panel, table, utc, sanitize, templateSrv, getTheme());
       const html = renderer.renderCell(1, 0, 42);
 
       expect(html).toBe(expected);