Color Lighten and Darken

ScottPlot.Plot myPlot = new();

Color color1 = Colors.Blue;
Color color2 = Colors.Blue;

for (int i = 0; i < 10; i++)
{
    var circle1 = myPlot.Add.Circle(i, 3, 1);
    var circle2 = myPlot.Add.Circle(i, 0, 1);
    circle1.FillColor = color1;
    circle2.FillColor = color2;
    color1 = color1.Lighten(.2);
    color2 = color2.Darken(.2);
}

// set outline style for all circles on the plot
foreach (var circle in myPlot.GetPlottables<ScottPlot.Plottables.Ellipse>())
    circle.LineColor = Colors.Black;

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