Rather than type this every time, I'll just make this post and link to it when relevant.
I don't work in color much beyond flats, so if somebody wants to see my stuff in color they'll probably have to do it themselves.
All of my sketched/black-and-white art is free to lineart/color as long as you ask me permission and I approve. Yes, this is quality assurance, I don't want my stuff out there with shitty coloring jobs; if all you're gonna do is add hacky gradient pillow fills with MS Paint I'd rather if you didn't.
It cannot be used for profit, commercial use, hidden behind a paywall, put on a T-shirt, etc. It must be publicly displayed at the original resolution or higher; I may have higher quality (bigger rez, png instead of jpg, useful transparency, etc) work files available, which is another good reason for asking me for permission. Finally, I will give 100% of the credit to the colorist with as many links as requested, but I will be posting it in my gallery; please send me a copy to make this simpler.