> For the complete documentation index, see [llms.txt](https://docs.emaildelivery.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emaildelivery.com/docs/backend-administration/change-your-colors-and-theme-using-custom-css.md).

# Change your colors and theme using Custom CSS

Access the CSS editor by going to Customer Accounts -> Advanced Configuration -> defaults -> Custom CSS tab

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