Often, I have MANY tabs open on the browser. The tab that is open is often hard to locate at the top, because it is a lighter color of gray than non-active tabs (too similar when the tabs are tiny from there being many tabs).
If the active tab was pure snow WHITE in color, it would have more contrast and stand out more from the other tabs.
(it has to do with some people have poorer eyesight than perfect)
Thanks