In explore, if you have an achromia or Melanistic lion, their eye color in the bottom explore bar (where you see the map, eyes, explore button) are the regular colors that your eyes would be if your lion was a regular lion, and not mutated.

I suggest lions that have these mutations keep their mutated eye colors (pale pink for achromia, and jet black for melanism) rather than their "normal" eye colors.

Another suggestion, when you're fighting, the icon in the top corner that contains your lion should keep his mutation rather than reverting him back to his "normal" looks.