From Rusted Promises
|Description||You have unusual control over the pigments in your body, allowing you to slowly assume new colors. The patterns remain the same, but you can change the hues that appear within them to a dizzying variety of shades by controlling the amount of red, green, and blue color you allow to escape from your fur, scales, flesh, or otherwise. The process of going from one color to another taking 25 minutes for an average size being. You cannot do spots, stripes, or otherwise change the patterns you were born with.|
If you have this and Bio Luminescence, you can change the color of the light, including to colors that don't actually cause a glow.