Does anyone know how to achive this coloring?

by
changed_my_mind
Before anyone tells me to ask her, I already did, as did other people too, but she never answers D: I'm sure it must be really simple. Hopefully someone can help out! ^^

by
Before anyone tells me to ask her, I already did, as did other people too, but she never answers D: I'm sure it must be really simple. Hopefully someone can help out! ^^
