The primary reason Color fell flat on its face after it was released, its creators say, was because there weren’t enough people using it to make it interesting enough to revisit on a regular basis.
Chicken and egg problem here. Apps like Color rely on mass usage to be interesting to users, but users won’t become users if a service isn’t interesting when they sign up.
An app has 30 seconds from the time I launch it to interest me, otherwise I move right on.
I gave Color 5 minutes, all of which were spent on trying to figure out what the hell the app was all about.