I like it as it is,... nice play with colours. Reminds me of my tee that I wear while I paint. I get acrylic on it while painting, so I often throw more paint on them to give it a more artistic feel. I definetly buy one. Maybe even 2. Keep up the good work.
It could be adjusted to fit other coloured tees, but I don't think it'll do justice to it if I put it on black. What I had in mind was colours. Use as many as I can even if I only have 4 to use. Use a dull colour with bright coloured graphics and vice versa. It really helps bring out the actual subject, which is the design.