Irotore! (com.livejournal.karino2.irotore) on Google Play
Choose your favorite painting and select color that are specified randomly by app with standard color picker .You can check the difference between result and your selection.5 times color picking is one game and the average of color differences are stored.(So lower score is better).If the location specified by app is ambiguous color point, please use SKIP button.Screenshot image is:http://cc-library.net/010009345_free-painting/