Just my 10p, but when I think of Senna, I don't think of green and yellow. I know he was Brazilian and those are the colours of the Brazilian flag, but to me his colours are red and blue with a small bit of yellow. His car liveries were always predominantly red or blue, and he only ever had a small stripe of green on his helmet.
I wont be buying the set because I'm not a fan of SA, and I have no money, but as a fan of Formula 1, these colours do not represent Ayrton Senna.
Edit: My alterations would be maybe red or blue mods, a yellow number row, and maybe some green novelties with Brazilian flags as well but I think the green is too much.