There are many X-men with skin tones that wouldn't be considered normal for the human race. Some of these include (this is NOT a complete list):
Others can assumed unnatural forms, not necessarily colors:
There are MANY MANY MANY more than what is featured here. That is part of what makes the X-men so great.
Cupcake icing colors come in many different colors. The cake part of the cupcake can also come in many colors. (For example, red velvet cupcakes are red)
There are a number of different colors that can be found in the shell of a pineapple fruit. There are different shades of green, yellow, brown, white, and black for example.
A human eye can distinguish about 10 million different colors.
You can combine different layers of colors. For example, layer 1 = blue, Layer 2 = red. Use red pen underneath blue paint. Just use different combos of pens, paint, and colors.
This applies not only to opaque objects. The basic idea is that white light is a mixture of different colors, and objects tend to reflect the different colors - the components of white light - in different proportions. For example, an object that reflects most of the red light but not much of the other colors will look red.
They (we) use different formulas to create different colors because when different chemicals burn they do so at different temperatures and they produce a different wave length of light that we see as different colors. For example Copper II Oxide can be used to make the color blue.
Different contries have different colors of flowers. For example, spidermoms and hypericum berries.
You can combine different layers of colors. For example, layer 1 = blue, Layer 2 = red. Use red pen underneath blue paint. Just use different combos of pens, paint, and colors.
Yes. Mold can be different kinds of colors. For example it can be black. green, yellow. purple and even blue!
White light is a mixture of different colors. A red object (for example) would reflect a greater percentage of red light, and a lesser percentage of other colors, thus making the light that you see redder.
Colors like white and yellow are example of light colors while colors like black and brown are example of dark colors.
There different colors emitted