ScottPlot.NET
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Background Gauges Dim

By default the full range of each gauge is drawn as a semitransparent ring. The amount of transparency can be adjusted as desired.

This code sample is specific to ScottPlot 5 (details)
ScottPlot.Plot myPlot = new();

myPlot.Add.Palette = new ScottPlot.Palettes.Nord();
double[] values = { 100, 80, 65, 45, 20 };

var radialGaugePlot = myPlot.Add.RadialGaugePlot(values);
radialGaugePlot.BackgroundTransparencyFraction = .5;

myPlot.SavePng("demo.png", 400, 300);

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