I have a suggestion for the program, "if possible". Can you make a color palette at the bottom of the setting screen basically replacing the RGB values with a color palette to change it's place (i'll say like, 240 in width and as high as you can go on height). Maybe use the trackball " pearl " to navigate around freely within the palette and maybe have some sort of picture in picture effect and show a descent sized square on the upper left giving you a preview of the color as you go around the palette and then select it.