What are the Seahawks team colors?

Using google to figure out the seahawks team colors I entered "seahawks colors". The first link to return was an article written for the Pittsburgh Post-Gazettet. How could that be I wondered. I read the article and discovered the truth about our local team and the local fans.
http://www.post-gazette.com/pg/06025/643760.stm
Personally I don't own any Seahawks team gear and I too must admit that it does seem strange to have the Seahawks in the Super Bowl.