Use APKPure App
Get RGB Colors old version APK for Android
Utility for RGB, HSB, CMYK colors.
A small utility to build a color from its RGB components, give its "HTML code", convert it into the systems HSB (hue, saturation, brightness) and CMYK (cyan, magenta, yellow and black).
This application is part of the workshops offered in my book "Programming for Telephones" to go out.