RGB ID is a great application that lets you get color information from any image you can take with your iPhone camera, or from any image in your photo album.

It’s easy! Just take a picture, tap on any location of the image, and instantly get RGB and Hex color information. Selected colors can be saved into your color library and sorted.

RGB ID can help speed up your workflow by allowing you to quickly experiment with various color schemes from anything you can point your iPhone at.

http://appshopper.com/utilities/rgb-id