If you are working on a new color picker, it might be useful to add a property for the corresponding shadow color value for any selected color. What I’m referring to is the shaded color portion of something like the colored bars in the chart component when 3-D is selected. I had to create a similar chart with the paintable canvas, and all I did was take the rgb values and multiple them by .75 to get something that looked very close to your shading, although I’m not sure if that’s correct. It would be that much easier if there was a “shadow” property where this was calculated already.