Facebook Black is a scam
All these tricky messages have been spreading around for the last few days. They say: “Are you sick fo that boring old blue theme? Well now you have the power to change your facebook color to anything your heart desires.” However, instead of giving what they promise, they redirect you to a page, which offers to take a part in some survey. Be aware that such forms can make you unnoticeably share your personal information, what may result in takeover of your Facebook’s or other account.
If you have accidentally clicked on this link, first thing you should do is to report it as spam to Facebook. Besides, remove all photos and “likes” from your account and check what apps have an authorized access to your account. Finally, scan your computer with anti-malware program to make sure that there are no viruses on your machine.