I made a pair of 3D glasses from a youtube video and wanted to try them out on Minecraft. So once I turned it on the glasses didn't work for me so I turned 3D off. Then my hand didn't look normal. Instead of the forest green it usually is it was a pale, almost sick, green. I press F5 and my whole skin looks like that! Even the parts that were yellow, tan and even black! I know nobody messed with my account so I'm guessing this is a bug. (I also tried leaving and coming back, but it was the same thing.)
The second picture is of my skin, the first picture is when I saw my skin color changed.