> For the complete documentation index, see [llms.txt](https://docs.limio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.limio.com/components/ui-primitives-and-theming/theming.md).

# Theming Guide

Limio supports theming so each customer can have their own visual identity while using the same component library.

[**View interactive theming guide in Storybook**](https://innovate42.github.io/innovate42-service-template/?path=/docs/theming-guide--docs)

## How it works

Every component's appearance is driven by CSS custom properties (design tokens). You inject a stylesheet that overrides the tokens you want to change — everything else inherits from the default theme.

You can inject custom CSS via your Limio settings (Developer → General Settings). See [how to inject custom code](https://docs.limio.com/product/analytics/how-to-configure-the-limio-data-layer-to-collect-user-events-for-analytics) for the general approach.

## Customising your theme

Inject a CSS stylesheet that overrides the [design tokens](/components/ui-primitives-and-theming/design-tokens.md) you want to change:

```css
@layer base {
  :root {
    --tw-primary: 220 85% 45%;
    --tw-primary-foreground: 0 0% 100%;
    --tw-text-primary: 220 60% 15%;
    --tw-text-secondary: 220 30% 35%;
    --tw-surface-main: 220 15% 96%;
    --tw-radius: 0.75rem;
  }
}
```

Only override what differs from the default. All other tokens inherit automatically.

Colour values are **space-separated** HSL triplets **without** the `hsl()` wrapper (e.g. `220 85% 45%`, not `220, 85%, 45%` and not `hsl(220, 85%, 45%)`). Components compose the token as `hsl(var(--tw-primary) / <alpha-value>)`, so a comma-separated value produces invalid CSS and silently breaks every opacity utility (for example the Button's `hover:tw-bg-primary/80`).

## Testing your changes

Use your browser's developer tools to override token values and preview changes instantly in Storybook.

## Further reading

* [Design Tokens](/components/ui-primitives-and-theming/design-tokens.md) — all available tokens and their defaults
* [Primitives](/components/ui-primitives-and-theming/primitives.md) — the component catalogue
* [Compositions](/components/ui-primitives-and-theming/compositions.md) — real-world patterns showing themed components in action


---

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