MacBook Air (13-inch, Mid 2012) yellow tint when watching Netflix or YouTube in fullscreen
I noticed that this yellow tint problem just occurs on chrome but not on safari. I updated chrome and tested it out - still happening. I then restarted my MBA and it disappeared. Will observe that problem for the next days but I hope that helps anyone. Also, I hardly restart or shut down my MBA, it's been on or in standby for over 2 months.

Update: still happening but found a new solution. I deactivated my extension 'Magic Actions for Youtube' and the problem disappeared. Again I will check if it still occurs.