You can change the SharePoint colors by following instructions:

1. On your site, click Settings  and then click Change the look > Theme.

   Note: If you don’t see Change the look on the Settings menu, you may not have permission to manage this option. Select the look you want. You’ll see a preview of what your site looks like with the selected theme applied. Click Save to apply it to your site or, if you don’t like what you see and want to revert back to what you had in the beginning, click Cancel instead.

2. Notes:

   • Your administrator may have set site theming to show only a list of company-approved themes. If so, you won’t see any of the default SharePoint themes.
   • If you’re updating the theme on a subsite or your administrator has sites set to the classic experience, follow the instructions in the Classic experience designs section .

   

3. To customize the colors of one of the default SharePoint themes, select the theme and then click Customize.

4. Choose the main color and accent color you want, and then click Save to apply it to your site. The list of main colors and accent colors varies depending on the default SharePoint theme you choose to customize.