GraphNG: Do not set fillColor from GraphNG only opacity (#29851)

* GraphNG: Do not set fillColor from GraphNG only opacity

* use color settings if they exist

Co-authored-by: Ryan McKinley <ryantxu@gmail.com>

packages/grafana-ui/src/components/GraphNG/GraphNG.tsx

@@ -157,14 +157,13 @@ export const GraphNG: React.FC<GraphNGProps> = ({
       builder.addSeries({
         scaleKey,
         drawStyle: customConfig.drawStyle!,
-        lineColor: seriesColor,
+        lineColor: customConfig.lineColor ?? seriesColor,
         lineWidth: customConfig.lineWidth,
         lineInterpolation: customConfig.lineInterpolation,
         showPoints,
         pointSize: customConfig.pointSize,
-        pointColor: seriesColor,
+        pointColor: customConfig.pointColor ?? seriesColor,
         fillOpacity: customConfig.fillOpacity,
-        fillColor: seriesColor,
         spanNulls: customConfig.spanNulls || false,
       });
 

packages/grafana-ui/src/components/uPlot/config/UPlotSeriesBuilder.ts

@@ -81,9 +81,11 @@ export class UPlotSeriesBuilder extends PlotConfigBuilder<SeriesProps, Series> {
     }
 
     if (fillOpacityNumber !== 0) {
-      fillConfig.fill = tinycolor(fillColor ?? lineColor)
+      fillConfig = {
+        fill: tinycolor(fillColor ?? lineColor)
           .setAlpha(fillOpacityNumber / 100)
-        .toRgbString();
+          .toRgbString(),
+      };
     }
 
     return {