Dark colours.. Most of the time they are used for outlines in my work, but not for fills. It remained sort of a mystery for me, after failing some approaches back in the day. Same for inlines, if they are white or whatever colour you can imagine; You've got to get the right letters for those effects.
I tried to do both in this piece, once again. This time it is sort of 'presentable' in a way, but everything I upload on here has one thing in common; Its all improvable.
I've also uploaded a video of this sketch on my Instagram!