So here's a sketch for a little experiment painting I'm making for my puzzle game.
Usually in painting it's all about the shading, the values( darkness/lightness of colors). I decided to say screw it and to see if i can paint something using exactly the same value for each color. If you turn off the saturation for this psychedelic mountain thing sketch it looks like a flat gray image and nothing is discernible. Should be an interesting challenge.