Color Analyzer uses the mobile phone's camera to capture a scene. Different areas of this capture can be analyzed into screen and print colors. The app can then be used to choose colors that can be mixed to produce the captured object's color. In addition, the app will show the proportion of the colors to mix, the amount of white space to be included in the mixed color, and how closely the final mixed color matches the object's color.
Please see the apps website for a fuller explanation of the app and of the difference between screen colors and printed colors and inks.

https://paragonapps.wixsite.com/coloranalyzer