Color Thief is a script for grabbing the dominant color or color palette from an image. Uses Javascript and the canvas tag to make it happen. This script could be useful for sites that sort and search by color.

With Color Thief you can also build a UI that adapts to the colors of an image. For example, you could add color accents to the UI by changing the font or border color depending on what image is currently being displayed in your portfolio.

A recent example of a color adapting UI is seen on Google Chrome’s new home tab. The dominant color of the favicon is used as the bottom border color on the screenshot.

Requirements: JavaScript and Canvas
Demo: http://lokeshdhakar.com/projects/color-thief/
License: Creative Commons 2.5 License