[ryanmercer]

That's actually a good solution. Color detection is relatively easy, given it has been used for paint mixing for a long time.

The current lego pallet should still be at 51 colors, there might be issue with clear elements but for the most part they'll be significantly different than the other elements in a set being things like windows, windshields and cockpits. Also in a given set you are unlikely to have many, if any, of the same elements in similar shades that might get confused by an app.

The app would be useful for those that can see too just for listing elements on secondary markets like Brick Link.

It is far beyond my means but as an adult fan of lego I definitely see value in it.