How to tag this?

Sorry if this is a stupid question but how do I tag this post #614242? Its unfinished so I was wondering if there was a tag for pics that are deliberately unfinished.

work in progress? partially colored? unfinished? incomplete?

Given that unfinished and incomplete lack wiki entries and are rather vague without them, and also seeing how the line art on that pic is done and it only lacks coloration, I'd go with partially_colored.

Thank you.