Downloading CocoaColor 2.2 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The software lies within Developer Tools, more precisely Webmaster Tools.
We recommend checking the downloaded files with any free antivirus. The most popular versions of the tool are 2.2 and 2.1. The bundle identifier for this app is com.delsolsoftware.cocoacolor. This software for Mac OS X is an intellectual property of Del Sol Software.
From the developer:
Cocoa Color - CSS, Mac and iOS color and gradient app.
For a video demo, please visit www.delsolsoftware.com/cocoacolor/index.html
CocoaColor is a color finder for CSS, Mac, and iOS development.
CocoaColor provides a much more robust interface for color picking, including CSS HSLA controls.
You may want to check out more Mac applications, such as MacCVSClient X, Blog.Mac Template Editor or RAGE WebDesign, which might be related to CocoaColor.