Blue Button? (Like the Quit Button)

[ffsmanwtf123]

Hello, Last week my friend gave me his macbook for a week. So, i was just loading up Safari, and noticed that his close button was Blue, there's a link to the picture. What could be the problem? Or has he done something?
LINK FOR THE PICTURE BELOW:

http://oi52.tinypic.com/2qjc201.jpg

 

[Kaveman]

I'm going for a Joke;-)
When you load up a photo is there the same red shift?