Yellow Eyed Tang or kole tang question

[porschefrk]

I have a yellow eyed tang in a 60 gallon and his color is fading away, he is still very active and eats well but his color is fading away, he looks sick. I also recently lost 2 clowns about 4 days after i bought them i don't know if that tragic incident has anything to do with the kole tang losing its color.

Any comments or suggestions are highly appreciated. thanks.

[lando]

What are your current water parameters, ammonia, nitrite, nitrate, SG, Ph, temp? How old is the tank? What are you feeding?