I have this problem where I use the same color throughout the entire image, thinking that it should be reflective light off objects, and for shading, use a different, but same color (in this case, yellow for all the lighting and blue for all the shading). *sigh* I do this because I'd like for the image to sort of match, but the tactic just makes the image look confusing because of all the same colors. =\
Because the colors looked a bit similar in the original painting, I tweaked them a bit on the computer. ;__;