HCA: Hermit Crab Association

Superman my original crab that i have had for 4 years appears to have blue feelers. They are not real dark either they are a little lighter in color. They are actually quite pretty but none of my crabs have feelers like his. Is this normal? Is he being deprived of something?

It is normal, there is a wide range of possible color combinations in PPs and blue feelers is one of them. It can change during molts, and it may also be that they'll continue to darken for a bit post-molting.