You could have downloaded WebColorPicker 1.2.0 for Mac from our application library for free. WebColorPicker for Mac lies within Developer Tools, more precisely Webmaster Tools. This software for Mac OS X was originally designed by Dekorra Optics, LLC.
From the developer:
WebColorPicker is a plugin addition for the Mac OS X operating system. Once installed, it is accessed from the main OS X color selection panel (usually recognized on OS X by the colorful "color wheel"); it is available for integrated use with any OS X application that uses the system wide color selection panel.
You may want to check out more Mac applications, such as Browsealoud, RAGE WebDesign or solr, which might be related to WebColorPicker.