diff --git a/ApplicationCode/Commands/SummaryPlotCommands/RicNewSummaryEnsembleCurveSetFeature.cpp b/ApplicationCode/Commands/SummaryPlotCommands/RicNewSummaryEnsembleCurveSetFeature.cpp
index 17c7954952..d9d8039433 100644
--- a/ApplicationCode/Commands/SummaryPlotCommands/RicNewSummaryEnsembleCurveSetFeature.cpp
+++ b/ApplicationCode/Commands/SummaryPlotCommands/RicNewSummaryEnsembleCurveSetFeature.cpp
@@ -67,7 +67,12 @@ void RicNewSummaryEnsembleCurveSetFeature::onActionTriggered(bool isChecked)
     {
         RimEnsembleCurveSet* curveSet = new RimEnsembleCurveSet();
 
-        size_t colorIndex = plot->ensembleCurveSetCollection()->curveSetCount();
+        // Set single curve set color
+        auto allCurveSets = plot->ensembleCurveSetCollection()->curveSets();
+        size_t colorIndex = std::count_if(allCurveSets.begin(), allCurveSets.end(), [](RimEnsembleCurveSet* curveSet)
+        {
+            return curveSet->colorMode() == RimEnsembleCurveSet::SINGLE_COLOR;
+        });
         curveSet->setColor(RiaColorTables::summaryCurveDefaultPaletteColors().cycledColor3f(colorIndex));
         curveSet->legendConfig()->setColorRange(RimEnsembleCurveSetColorManager::cycledEnsembleColorRange(static_cast<int>(colorIndex)));
 
diff --git a/ApplicationCode/Commands/SummaryPlotCommands/RicSummaryCurveCreator.cpp b/ApplicationCode/Commands/SummaryPlotCommands/RicSummaryCurveCreator.cpp
index 89c2306840..f474fe3158 100644
--- a/ApplicationCode/Commands/SummaryPlotCommands/RicSummaryCurveCreator.cpp
+++ b/ApplicationCode/Commands/SummaryPlotCommands/RicSummaryCurveCreator.cpp
@@ -437,12 +437,18 @@ void RicSummaryCurveCreator::updatePreviewCurvesFromCurveDefinitions(
                 curveSet->disableStatisticCurves();
                 curveSet->setSummaryCaseCollection(curveDef.ensemble());
                 curveSet->setSummaryAddress(curveDef.summaryAddress());
-                m_previewPlot->ensembleCurveSetCollection()->addCurveSet(curveSet);
 
                 // Set single curve set color
-                size_t colorIndex = m_previewPlot->ensembleCurveSetCollection()->curveSetCount();
+                auto allCurveSets = m_previewPlot->ensembleCurveSetCollection()->curveSets();
+                size_t colorIndex = std::count_if(allCurveSets.begin(), allCurveSets.end(), [](RimEnsembleCurveSet* curveSet)
+                {
+                    return curveSet->colorMode() == RimEnsembleCurveSet::SINGLE_COLOR;
+                });
                 curveSet->setColor(RiaColorTables::summaryCurveDefaultPaletteColors().cycledColor3f(colorIndex));
 
+                // Add curve to plot
+                m_previewPlot->ensembleCurveSetCollection()->addCurveSet(curveSet);
+
                 if (m_previewPlot->ensembleCurveSetCollection()->curveSets().size() > 1 && ensembleCurveCnt > ENSEMBLE_CURVE_COUNT_THRESHOLD)
                 {
                     // Toggle off new curve set and display warning
@@ -767,11 +773,20 @@ void RicSummaryCurveCreator::applyAppearanceToAllPreviewCurves()
     RimSummaryCurveAppearanceCalculator curveLookCalc(allCurveDefs, getAllSummaryCaseNames(), getAllSummaryWellNames());
     initCurveAppearanceCalculator(curveLookCalc);
 
+    // Summary curves
     for (auto& curve : m_previewPlot->summaryCurves())
     {
         curve->resetAppearance();
         curveLookCalc.setupCurveLook(curve);
     }
+
+    // Ensemble curve sets
+    int colorIndex = 0;
+    for (auto& curveSet : m_previewPlot->ensembleCurveSetCollection()->curveSets())
+    {
+        if (curveSet->colorMode() != RimEnsembleCurveSet::SINGLE_COLOR) continue;
+        curveSet->setColor(RiaColorTables::summaryCurveDefaultPaletteColors().cycledColor3f(colorIndex++));
+    }
 }
 
 //--------------------------------------------------------------------------------------------------
diff --git a/ApplicationCode/UserInterface/RiuSummaryCurveDefSelection.cpp b/ApplicationCode/UserInterface/RiuSummaryCurveDefSelection.cpp
index e56e37ff59..072593dcca 100644
--- a/ApplicationCode/UserInterface/RiuSummaryCurveDefSelection.cpp
+++ b/ApplicationCode/UserInterface/RiuSummaryCurveDefSelection.cpp
@@ -388,7 +388,8 @@ void RiuSummaryCurveDefSelection::setDefaultSelection(const std::vector<SummaryS
 
     if (allSumCases.size() > 0)
     {
-        RifEclipseSummaryAddress defaultAddress = !hasEnsembles ? RifEclipseSummaryAddress::fieldAddress("FOPT") : RifEclipseSummaryAddress();
+        RifEclipseSummaryAddress defaultAddress = !hasEnsembles ?
+            RifEclipseSummaryAddress::fieldAddress("FOPT") : RifEclipseSummaryAddress();
 
         std::vector<SummarySource*> selectTheseSources = defaultSources;
         if (selectTheseSources.empty()) selectTheseSources.push_back(allSumCases[0]);