The YUI Library is a set of utilities and controls, written in JavaScript, for building richly interactive web applications using techniques such as DOM scripting, DHTML and AJAX. YUI is available under a BSD license and is free for all uses. The YUI project includes the YUI Library and two build-time tools: YUI Compressor (minification) and YUI Doc (documentation engine for JavaScript code).
Who would’ve thought a color library would end up mixed in with a bunch of JavaScript and PHP libraries? Well they do have a pretty sweet little color library for finding color combinations, all you do is select the color and they show you some nice com