Bing blue

http://news.cnet.com/8301-13860_3-20000623-56.html

"When Microsoft was designing what would eventually become Bing, it tested a vast number of colors and it turned out that the one that users engaged with the most was indeed blue. More specifically, it was a shade of blue quite similar to the one used by Google."

The code in html/css is #0044CC.

tango.info is using #0044CC.