Ok thanks, will keep it in mind for later.@khz: Do what I do; colour pick the problem colour on the right arm, click "Edit colours", make it a few shades darker, and then Fill tool the new colour in. Doesn't look good? Just go back and make it lighter/darker. Simple. Hope I helped :>.
And now for my second attempt at sprite editing (correct terminology I hope):
Salamence posing as Dragonite.