DIY Comic Book Jeans first seen at Fashionably Geek. These were made by Kirameku (facebook link) for her Boarderlands’ costume. You can see the final costume on her FB page. She used Textilcolor paint and then thinned it for the “watercolor” shadowing seen in the bottom right photo. She says she may post a full tutorial and if she does I will certainly post a link here.
Need a way to wing it?