That's a good thing as it will give you more versatility. But keep in mind that you can also make beautiful artwork using pastel colors and a more limited range of values (I think it's called high key lighting)
Also I really enjoy the three eyed lady. She looks lovely! The only small thing I've spotted is that a strand of hair on her right is creating a tangent with her right arm and hip. It's not too obvious, but it's one of those things that I can't unsee now XD
Otherwise, good job!