I prefer the red shirt to be the back drop for the logo as opposed to the canary yellow you originally mentioned. You should make one of Ohata.
It's actually burnt orange. It's not too clear since I took it with flash on. I only was going to use Canary Yellow because I couldn't find an orange shirt at first, then I found it at JoAnne's.
Here is the final product:
I ended up making it on a size M shirt. I think Hiroyo and I are about the same height, but she's got about 30 pounds on me I think. So I think a Size M would fit better. I wonder if you guys would concur? She doesn't seem to wear very tight shirts.
P.S. I did make a Ohata shirt. Check her thread.