Coloring progress
at first i imported the sketch into a software then i used some brightness and saturation slider to make the sketch cleaner and changed the hue of it too, because it was originally green.
i made it red before proceeding with the coloring phase. after the flat colors, i am placing darker and lighter colors, which is easier since i sketched this one well. this is one of my favorite sketch. the coloring version should be favorite as well