so is it possible for trolls with lime,olive, purple, violet, etc etc do have psychic powers? like arabias or vriska?

They seem Caste-bound. It is possible, however, Limes, Olives, Violets or Fuchsias may have innate Caste-related powers we don’t know about though, like, maybe Nepeta and co just didn’t have that caste-specific mutation. Purples have Chucklevoodoos.