> For the complete documentation index, see [llms.txt](https://kvision.gitbook.io/kvision-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kvision.gitbook.io/kvision-guide/2.-frontend-development-guide/dark-mode.md).

# Dark mode

KVision fully supports Bootstrap dark mode. You can use `io.kvision.theme.ThemeManager` component from the `kvision-bootstrap` module to work with color themes. 

```kotlin
import io.kvision.theme.ThemeManager

class MyApp : Application() {
    init {
        ThemeManager.init()
    }
}
```

By default theme manager is initialized with auto-detected mode and saves the mode selected by the user in the browser local storage. You can modify this behavior with additional parameters of the `init()` method.

```kotlin
import io.kvision.theme.Theme
import io.kvision.theme.ThemeManager

class MyApp : Application() {
    init {
        ThemeManager.init(initialTheme = Theme.DARK, remember = false)
    }
}
```

You can use `ThemeManager.theme` property to manually select the color theme.

```kotlin
button("Switch to dark mode").onClick {
    ThemeManager.theme = Theme.DARK
}
```

You can also use built-in `ThemeSwitcher`, component which is a `Button` subclass designed as the color mode toggler (you need to also include Font Awesome module for icons).

```kotlin
themeSwitcher(style = ButtonStyle.OUTLINESECONDARY, round = true)
```


---

# 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://kvision.gitbook.io/kvision-guide/2.-frontend-development-guide/dark-mode.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.