Manga Bulma with blue-hair Chi-Chi:

White Kaio:

I gave him a very subtle blue-tint, just so he wouldn't look the same color as the trim of his sleeves.
Korean cover Vegeta 1 (aka Green Bay Packers Vegeta):

I made the tint of green on his pants and undershirt more blue to separate them and keep it from looking too uniform. I also had to edit out the wrinkles of his shirt so I could turn his sleeves into skin.
And finally:
Korean Cover Piccolo (aka Biological experiment insectoid Piccolo):

(Click for full-size)
I flipped the image horizontally, because after doing so it closely resembles the pose on the posted cover(in fact, this is what that image reminded me of).
I'll do more soon.