Sick zoanthus button polyps?

[PurplePolyp]

I have a purple zoa button polyp. Half of them out pretty purple and light blue and the half have turned into more of a darker green. Water parameters are great and everything else in the tank is fine. I have moved some stuff around last week. Could he just be stressed?

 

[kdpuffer]

The green ones look like they are shaded by something above them, this could be a cause.

 

[mfdrookie516]

Those look like palys to me. I had some that went from dark brown to a bright green. How long have you had them? They may just be changing colors like mine did.