Lion Safari - The scrollbar changes the color depending of the background of the current website. (dark or light)
/via Krausefx
Having two different scroll bar colors is actually really dumb, in my opinion. Commonly, a lot of websites have a dark body background, with the background color of the content being light. Like tumblr’s dashboard.
When a user zooms into the white content area, the white scrollbar pretty much vanishes, like this:
