Is there a power for changing colors/glowing?

I'm still trying to nail down a design for a character but I wanna make sure I'm staying within the rules. What kind of power would a character need to have glowing symbols and designs on their pelt that kind of shift and move around? They don't do anything other than look cool.

Also related but a little more weird: could a character be able to make their outside somewhat translucent and have their skeleton and organs glow from the inside?