
Customise the appearance of iCloud.com
On iCloud.com, you can choose a different background colour for the homepage. Depending on your device’s settings, you can also use a light or dark appearance for the entire site.
Change the background colour of the homepage
- Go to iCloud.com, then sign in to your Apple Account (if necessary). 
- Scroll to the bottom of the homepage, then click Customise. - Tip: If you are on iCloud.com but not on the homepage, click  in the toolbar, then click iCloud Home Page. in the toolbar, then click iCloud Home Page.
- Click Edit Background, then choose a colour. 
- Click Done in the top left-hand corner of the window. 
Choose a light or dark appearance

Dark Mode gives iCloud.com a dark colour scheme that is perfect for low-light environments. To use Dark Mode on iCloud.com, turn it on for the device you are using. See any of the following:
For other ways to personalise your iCloud.com experience, see Customise and use the homepage tiles on iCloud.com.