Have you looked in the display calibration settings @Anonymous User
Could there have been something you've downloaded or changed in the settings that may have caused this @
A Samsung Experience Store or Samsung Service Centre would be able to run a diagnostic.
🌈 Stay Safe 🌈
Current Phone ~
Samsung Note 20 Ultra 5G SM-N9860_256Gb SnapDragon 865+
Samsung One Ui 2.5/ Android 10.