> For the complete documentation index, see [llms.txt](https://docs.chamilo.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.chamilo.org/3.x/administration-guide/admin-guide/system/branding/color-themes.md).

# Color Themes

Chamilo 2.0 introduces a color theme system that lets you customize the visual appearance of the platform.

## How Themes Work

Color themes define the palette used across the Chamilo interface — primary colors, accent colors, backgrounds, and text colors. A theme is associated to an access URL: in a single-URL portal it effectively becomes the global theme, and in a multi-URL setup each URL can have its own.

## Applying a Theme

![The color themes page showing available themes with preview swatches and an Apply button](/files/vqWUs5Pq0Zl1QNEyHp4c)

1. From the administration panel, navigate to **Color themes**
2. Browse the available themes
3. Select a theme and click **Apply**
4. The theme is immediately applied to the platform

## Per-URL Themes

In a multi-URL setup, each access URL can have its own color theme. This allows different portals to have distinct visual identities while sharing the same Chamilo installation.

## Tips

* **Match your brand** — Choose or customize a theme that matches your organization's brand colors
* **Test readability** — After applying a theme, check that text is readable against background colors, especially in high-contrast situations
* **Consider accessibility** — Ensure sufficient color contrast for users with visual impairments