T3knomanser has created a palette of web-colors corresponding to the sixteen "illegal" digits comprising the AACS key. This key — part of a system to decode HD-DVD discs so that they can be backed up and played under Linux — has been the subject of a firestorm of controversy, as the AACS licensing authority has used legal threats against dozens of sites, promising retribution if the number isn't disappeared. As of right now, more than 60,000 pages contain to the digits.
(Thanks, T3knomanser!)
Update: Bronwen sez, "An Australain developer realised the code also be represented as a color-palette, which he now hopes to sell as T-shirts."