ColorExpert makes it easy to grab, identify, capture and showcase your chosen colors. If you find yourself looking at a picture or graphic art and you’d like to use this color scheme in your design, then you can simply click the ColorExpert button on your iPhone and find out the shade, color scheme, and palette you would like to match. You can later email your findings to yourself for desktop use, a friend, or to a client as well.
Best Colour App for the iPhone! Costs £5.99 for the App Store.