@Oreo22xgen : Is this issue affecting all apps with a white background, or just specific ones? If you head to Settings > Display > Screen mode, is 'Vivid' selected? Furthermore, is the White balance slider centralised, and are the Red, Green and Blue sliders over to the right in 'Advanced Settings'?
You may also wish to head to Settings > Accessibility > Vision enhancements > High contrast theme, and set this to 'none' (if Yellow is active). Also, check 'Relumino outline', if available, and toggle this option off.
