mmm how i do this ?
hummmm,you could do it like this (with 5 colors
) :
so for advices :
don't use several colors for such a little size. This character has similar colors in head and shirt, so you could use the same ones.
Don't create a "blur" in your pixel to make a sort of antialiasing. In you sprite, it's seems to be a sort of photoshop resizing...
Finaly, you could use originals colors instead of "greys"