It's a bug, Uber start implement color correction and it's not work properly somtimes. You can track it here: http://pa.lennardf1989.com/Tracker/index.php?do=details&task_id=2001 You can't fix it in game, but probably you can change color profile while you're playing.
Also you can invoke Intel HD control panel using Ctrl+Alt+F12, then go to "Advanced Settings" -> "Display" -> "Color Enhancement". After you configure colors you might save customized display profile for PA and use it when playing.