http://chaoticrs.com/
When you hover your moues of the Navigation Menu (Help, Calendar, etc.) it's a blue color. How can you change this?
http://www.w3schools.com/Css/sel_link.asp
Looks like the hover also include a reference to an image for that little triangle guy as well as active.
When you hover your moues of the Navigation Menu (Help, Calendar, etc.) then u can change its hover color in css.