The App is designed to learn how colors are composed by red, green and blue. You chose the quantity of each one and get the resulting color with the indication of the percentage of each of 3 components. Is useful also to study how to produce the wished color to prepare it in a different environment.
The App let also to color B/W drawings. It come with a library with about 100 B/W drawings. The library can be easily populate with more drawings.