It would be best to take it to a vet and ask if he has anything on him, or if he is going through some sort of emotional state
Your brain becomes more sensitive
To actually control the color of their skin, cephalopods Use tiny organs in their skin called chromatophores. Each tiny chromatophores is basically a sac filled with pigment, minute muscles tug on the sac, spreading it wide and exposing the colored pigment to any light hitting the skin.
