I do attempt to determine if the text color needs to be white or black but other than that it's pretty dumb. I was just pleased to have a completely senseless idea and get it up and live within a few hours with Django and Python.
I'm in the middle of creating a specialized CMS for Amber's print site in Django. Whenever I'm working on a project of that size, and in a new framework, I like to make simple little projects to test ideas. In this case I wanted to see how Django handled load, errors, and how to get mod_python and Django working correctly in a production environment.
Plus also I kind of liked the idea of owning a Google result for a hex color.