Luckily we have a tool that let me approximate what Jason was
seeing. xScope’s vision defect simulator confirmed that Tot’s
colored circles had serious issues. We had a new kind of
accessibility problem and one that went to the heart of the app’s
visual design. […]
This began an exploration on how Tot’s colorful rings could
change, while keeping the existing “dot” metaphor, a strong visual
Such a great example of how first-class accessibility and exuberant custom UI design don’t have to be at odds, but in fact can go hand-in-hand.