Find Pictures On Your Mac, by Color!

Deep is an application for Mac OS X 10.5 and higher that can find images on your hard drive based on the colors they use.

Its palette-searching capability can look for specific colors and similar colors; it can search based on image tags and keywords, location, aspect ratio, or image size; and it can also look at images in email attachments and iPhoto libraries.

This is a useful application for locating images with similar color properties, and for tracking down original versions of images after sampling a color from the edited file. Buy it for $34 from Ironic Software.