Colors in personalizations can modify the global theme color such as control center and setting icon. It supports custom color, and wallpaper color picking (the color will be re-picked after the wallpaper is replaced).
Setting method:
realme UI 7.0: Settings > Home Screen,Lock Screen & style > More > Colours
realme UI 6.0 & 5.0 & 4.0: Settings > Wallpapers & style > Colors
realme UI 3.0 & 2.0 : Settings > Personalizations > Colors
realme UI R & Go & S & T & U Edition: Not supported
realme UI 1.0: Not supported