Here's a tee that uses a bit of an unusual color...
It has Sonic on pink and purple backgrounds. Sonic mixed with either green or purple is uncommon in merchandise across the board. It doesn't look terrible, but for whatever reason, they just don't seem to do it. There's a row of colored stars at the top, and different rectangles for the large pattern. Each one has a different expression or pose for classic Sonic. The classic logo is large at the bottom, and also done in pink. It's bright and contrasty on the white of the tee.
Where is this sold? It seems to be a 2021 item.