Pixel art rendering

Hi, I have a character png as you can see here: http://imgur.com/a/uqRPM

Looks fine.

In unity it has a few weird discolorings: http://imgur.com/a/elOdl

It had some other issues with anti aliasing that I managed to fix but this one I can't figure out. I tried adding my own material like in an article I read but it didn't change the discoloring. Surely there is an easy answer to this?