There are several possible reasons for the orange discolouration of a MacBook Pro display, including settings of the display itself, software-related reasons, or problems with the display panel itself. The first thing you should do if your entire display looks more orange than usual is to look at Night Shift, True Tone, and other display color settings. However, when only a particular portion of your display is orange, it means that your problem is more likely to be hardware-related. Another thing that will allow you to identify the source of the problem is taking a screenshot.