I'm not quite sure I know what you mean by this, if you could be a bit more specific?
Oh yes, but there's always one cheap way that still usually works, making a shape with fill color and line color the same and making it inside of the thing you made to fill it up, this is sort of the unprofessional way of doing things but it works fine if you're careful, and you can also make more than one of these coloring shapes to fill in different bits