Second player challenge
Thank you but this is not AA bridge between colours. It's a thick outline softened a bit :) standard outline wasn't good at trying to imitate hand drawn cartoon, using thicker outline gave a very jaggy result on such small thing, and standard AA made it look too soft - almost smudgey. I'm aware this might not be the besta possible solution, but it looked much better than other three.
Good choice! I don't think the AA does anything though, there needs to be a better bridge between dark and bright, in my opinion.