chromatosis

noun3

1. •
   Pigmentation, especially unusual pigmentation of human or animal tissue.

   • […]“chromatoses corii,” which stands for transudations of coloring matters, and includes the suborders melasmata, dermatocholoses and heterochromatoses,[…] — 1887
2. •
   Pigmentation of tissue that normally is not pigmented.
3. •
   Excessive pigmentation of tissue that normally is pigmented.