[arianestrasse]

Loving the retro look of the controller! I find it a bit confusing that you have letters R, G, and B on the controller but you're modifying the Hue, Saturation, and Brightness values on the editor. Just a small nitpick.

[rhklein]

I changed that, because most people prefer HSB. Personally I draw in RGB mode, press 'm' to toggle modes.