> For the complete documentation index, see [llms.txt](https://documentation.rcore.cz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.rcore.cz/paid-resources/rcore_guidebook/v1/themes.md).

# Themes

Guidebook comes with 6 predefined themes, here you can find how to change them.

## How to change a theme

1. First navigate to `rcore_guidebook\client\html\index.html`
   1. The instructions are at the top of the file, but let's break it down!
2. Find the line with `<link rel="stylesheet" href="./css/dist/dark.css">`
3. There you can replace `dark` with one of the available themes
   1. **Available themes:** `dark, light, green, red, purple, gold`
   2. Example: To choose green theme you would replace `dark` with `green` like this: `<link rel="stylesheet" href="./css/dist/green.css">`

## How to make your own theme

1. First navigate to `rcore_guidebook\client\html\css\dist`
2. Then copy the `dark.css` theme and rename it to your liking
   1. Example: If you want to make a new pink theme, you would copy `dark.css` and rename it to `pink.css`
3. Open the new file and edit the colors inside
   1. 💡 You can use for example the [google color picker](https://g.co/kgs/EHLbpX) to pick the colors
   2. 💡 These are the main colors in dark.css that you can "Find & Replace" in your editor.
      1. primary: #1D2228.
      2. background: #13181f.
      3. accent: #ff9100.
      4. text: #E1E2E2.
4. Change the new theme in index.html as described above and enjoy your new theme! ✨🎉


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://documentation.rcore.cz/paid-resources/rcore_guidebook/v1/themes.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
