What Causes Colour Distortion on MacBook Screens?

The most common cause: macOS display settings

Before assuming a hardware fault, check these four settings, they account for the vast majority of MacBook colour distortion reports:

• Night Shift: shifts the display towards warmer, yellower tones after sunset. If it's enabled and you're working at night, your screen will look noticeably orange compared to during the day. Disable in System Settings → Displays → Night Shift.
• True Tone: adjusts the display's white point and colour temperature to match the ambient light in your room. Under cool fluorescent office lighting it makes screens look slightly blue; under warm incandescent light it looks warm and yellow. This is designed behaviour, not a fault. Turn it off in System Settings → Displays to see the display's calibrated native colour.
• Wrong colour profile: if a colour profile intended for an external monitor (sRGB, Adobe RGB, DCI-P3 etc.) has been applied to the built-in display, colours will look wrong. Reset to the default profile in System Settings → Displays → Color Profile.
• Accessibility colour filter: System Settings → Accessibility → Display → Color Filters can tint the entire screen in red, green, blue, or greyscale. An accidental activation (e.g. via a keyboard shortcut) is a common cause of sudden colour change.

Hardware causes of colour distortion

If all settings are correct and the distortion persists, hardware is the next suspect:

• Loose or damaged display flex cable: the cable that carries the display signal from the logic board to the screen can develop a fault, especially on MacBook Pro models opened previously or after a drop. Symptoms: colour bands, tint in part of the screen, flickering alongside the distortion.
• Flexgate on 2016–2019 MacBook Pro: the display flex cable on these models passes over a sharp edge and degrades with lid movement. Symptoms include a backlight fade from the bottom and eventual display faults. Apple ran a free repair programme for affected models.
• Physical pressure on the LCD panel: if an object (a pen, a crumb) was pressed between the lid and keyboard, it can create a pressure point on the LCD that causes a permanent colour distortion zone. The panel needs replacement.
• GPU or display controller fault: rare, but a failing GPU on older Intel MacBooks can produce systematic colour distortion across the full screen. Common on 2011–2013 MacBook Pro models with discrete AMD/Nvidia GPUs.

How to tell software from hardware

Connect an external monitor. If the external display looks correct and the built-in screen doesn't, the issue is your internal display. If both show the same distortion, it's the GPU or a system-level colour setting.

Also create a new user account (System Settings → Users & Groups) and log in as the new user. If colours look correct on the new account, the distortion is caused by a per-user display setting, not hardware.