grafana/public/app/plugins/panel/graph/time_regions_form.html

<div class="gf-form-group">
  <div class="gf-form-inline" ng-repeat="timeRegion in ctrl.panel.timeRegions">
    <div class="gf-form">
      <label class="gf-form-label">T{{$index+1}}</label>
    </div>

    <div class="gf-form">
      <label class="gf-form-label">From</label>
      <div class="gf-form-select-wrapper">
        <select
          class="gf-form-input width-6"
          ng-model="timeRegion.fromDayOfWeek"
          ng-options="f.d as f.value for f in [{d: undefined, value: 'Any'}, {d:1, value: 'Mon'}, {d:2, value: 'Tue'}, {d:3, value: 'Wed'}, {d:4, value: 'Thu'}, {d:5, value: 'Fri'}, {d:6, value: 'Sat'}, {d:7, value: 'Sun'}]"
          ng-change="ctrl.render()"
        ></select>
      </div>
      <input
        type="text"
        ng-maxlength="5"
        ng-model="timeRegion.from"
        class="gf-form-input width-5"
        ng-change="ctrl.render()"
        placeholder="hh:mm"
      />
      <label class="gf-form-label">To</label>
      <div class="gf-form-select-wrapper">
        <select
          class="gf-form-input width-6"
          ng-model="timeRegion.toDayOfWeek"
          ng-options="f.d as f.value for f in [{d: undefined, value: 'Any'}, {d:1, value: 'Mon'}, {d:2, value: 'Tue'}, {d:3, value: 'Wed'}, {d:4, value: 'Thu'}, {d:5, value: 'Fri'}, {d:6, value: 'Sat'}, {d:7, value: 'Sun'}]"
          ng-change="ctrl.render()"
        ></select>
      </div>
      <input
        type="text"
        ng-maxlength="5"
        ng-model="timeRegion.to"
        class="gf-form-input width-5"
        ng-change="ctrl.render()"
        placeholder="hh:mm"
      />
    </div>

    <div class="gf-form">
      <label class="gf-form-label">Color</label>
      <div class="gf-form-select-wrapper">
        <select
          class="gf-form-input"
          ng-model="timeRegion.colorMode"
          ng-options="f.key as f.value for f in ctrl.colorModes"
          ng-change="ctrl.render()"
        >
        </select>
      </div>
    </div>

    <gf-form-switch class="gf-form" label="Fill" checked="timeRegion.fill" on-change="ctrl.render()"></gf-form-switch>

    <div class="gf-form" ng-if="timeRegion.fill && timeRegion.colorMode === 'custom'">
      <label class="gf-form-label">Fill color</label>
      <span class="gf-form-label">
        <color-picker color="timeRegion.fillColor" onChange="ctrl.onFillColorChange($index)"></color-picker>
      </span>
    </div>

    <gf-form-switch class="gf-form" label="Line" checked="timeRegion.line" on-change="ctrl.render()"></gf-form-switch>

    <div class="gf-form" ng-if="timeRegion.line && timeRegion.colorMode === 'custom'">
      <label class="gf-form-label">Line color</label>
      <span class="gf-form-label">
        <color-picker color="timeRegion.lineColor" onChange="ctrl.onLineColorChange($index)"></color-picker>
      </span>
    </div>

    <div class="gf-form">
      <label class="gf-form-label">
        <a class="pointer" ng-click="ctrl.removeTimeRegion($index)">
          <icon name="'trash-alt'"></icon>
        </a>
      </label>
    </div>
  </div>

  <div class="gf-form-button-row">
    <button class="btn btn-inverse" ng-click="ctrl.addTimeRegion()">
      <icon name="'plus'"></icon>&nbsp;Add time region<tip>All configured time regions refer to UTC time</tip>
    </button>
  </div>
</div>