Gentle Palette is a color rounding tool is meant to work with the android palette support library or any color it works by rounding any given hex color to its nearest color in predefined colors array (color palette).
AndroidRandomColor library allows to generate random colors on Android.
A type-safe interface of image processing algorithms.
Alexei has some predefined image processing calculus that are accessible from the class ImageProcessingThing:
A beautiful set of predefined colors and a set of color methods to make your Android development life easier.