Sometime in the past I used gray as background, but some sprites are part of your outline standardized in that color. So I ended up confusing me. Since I used the dark green, I had this problem anymore. Furthermore, it is a standard color of paint, I have no problem to find it anywhere I go.
It eventually became vice, as the other colors of paint called attention and undermine the edition of the sprite. hehe
Rayo, use the goron's body to make fat people, not strong. I do not, know. For me it works.
When you save a sprite, save as PNG, to avoid distortion.