If you’re a longtime user of OS X, you’re probably familiar with Apple’s Digital Color ... screen under the mouse pointer and lets you copy the RGB color components of the resulting pixel.

or app developer—you frequently need to find the exact color of a particular item or pixel on your screen. Sip 1.3.2 (Mac App Store link) is perhaps the easiest way to get that information.

You can see from the photo above that each logical pixel on the Nexus One screen contains one ... I could get not just green shading but every color of the rainbow, albeit somewhat washed out.