I did look it up, melanism ; an increased amount of black or nearly black pigmentation of an individual kind of organism.

here is a link to an albino alligator http://www.freakyzoo.com/images/WhiteGator.jpg

notice the pink eyes.

here is a leucistic one http://www.animalpicturesarchive.com...ce_closeup.jpg

notice the black eyes.

This is a melanistic alligator http://pics.hoobly.com/full/HQ93KEIFYJOM.jpg


All albino frogs are typically yellow and not pink because they are usually green, which means their dark pigments are blues and their light pigments are yellows. So, Im not sure where you are getting your information but you are a bit confused about it.

Ive seen melanistic green tree frogs and other frogs and lizards that are green animals, and they are blue. Ive seen a ton of Albino frogs of different species and they are pretty much all yellows with pink eyes, and Ive seen a number of different leucistic reptiles and amphibians and they are all typically white with black eyes.