Completed it, and totally fudged the background with CGTextures.com and some random photo of a rainy window. (I know, cheap of me, but it's just practice art.)
Aaron Brothers put on a sort of contest where you could win prizes for taking a boring "Color Challenge" black-and-white t-shirt and making it purdy. Here are my sketchy watercolor concepts (including some doodles of keys from Tiffany & Co.):
And the final t-shirt design (front and back), made with a fabric pen and acrylic paints:
Trying to figure out a style for a Gaia requested drawing thing for LittleDemonMegami. Really out of practice. Hard to get into a real polished drawing. Exhale.