Open the Settings app
Tap Home screen and wallpaper
Tap Always-On Display or Lock screen, depending on your ColorOS version
Tap Clock style or Clock format
Choose your preferred clock design
Adjust the clock color if available
Select the clock position if available
Tap Apply or Save
To change the time format, go to Settings
Tap Additional settings or System settings
Tap Date & time
Turn on or off Use 24-hour format
To customize the home screen clock widget, long-press the home screen
Tap Widgets
Find the Clock widget
Drag the clock widget to the home screen
Long-press the clock widget to resize or remove it
To change the lock screen clock theme, open Themes
Search for a theme with a different clock style
Download and apply the theme
Restart the phone if the clock style does not update immediately