Looks good. What is it you are unhappy with on the colors. If I had to guess I would say the skull faces should be darker green, M's hair darker richer red, and crystals uniform brighter yellow? It looks great as is though.
as awesome as ur illustrations are.. how come parts of it always look unfinished? like the bottom left guy, u can see all the strokes.. and the girls calves... the edges are all mest up .. i noticed this in all ur drawings.. is it to save time?
Your colors look fine to me. Your concept of the Inhumans is incredible! I would applaud all the work you have done, but my hands are crapped and sore as it is right now, and they would fall apart! Great job!