Earlier today, 9TO5Mac posted a revealing story about Apple’s upcoming iOS 7 software, describing the all-new, flat design championed by lead designer Jony Ive. Interestingly, the story mentioned a unique color scheme for each app in iOS:
Additionally, the iPhone’s Notes app has replaced the yellow notepad design for a flat white look. Apps such as Mail, Calendar, and Maps have also gained a more uniformed look with flat white textures. While the core elements of those apps are mostly white, each app has been given a unique button color. Essentially, each app has a white base with a respective color theme. For example, the Calendar app could potentially have red buttons, while Messages could have green controls…
Apple has been known to drop hints about its upcoming releases in its press invitations, but there have been relatively few guesses about this year’s WWDC invite. Now it makes sense. Each layered color represents a preloaded app in the new iOS 7.
Some interesting discussion going on over at Hacker News: https://news.ycombinator.com/item?id=5764352