---
title: Customization
description: "Learn how to customize the configuration of Yamada UI."
---

To change the prefix of CSS variables, set the value to `css.varPrefix`.

### Generate a Theme

Use the [CLI](https://yamada-ui.com/docs/theming/cli.md) to generate a theme.

:::warning
Before running the following commands, you need to install `@yamada-ui/cli` and execute the `init` command. For more details, please see [here](https://yamada-ui.com/docs/get-started/cli.md).
:::

```bash
pnpm yamada-cli theme
```

```bash
npm yamada-cli theme
```

```bash
yarn yamada-cli theme
```

```bash
bun yamada-cli theme
```

### Change the Config

Change the `config.ts` in the generated theme.

```tsx
import { defineConfig } from "@yamada-ui/react"

export const config = defineConfig({
  css: { varPrefix: "custom" }, // [!code highlight]
  breakpoint: { direction: "down", identifier: "@media screen" },
  defaultColorMode: "dark",
  defaultThemeScheme: "base",
  notice: { duration: 5000 },
  theme: { responsive: true },
})
```

### Update the Provider

Set the generated theme to `UIProvider`.

```tsx
import { UIProvider } from "@workspaces/ui"
import { theme, config } from "@workspace/theme"

const App = () => {
  return (
    <UIProvider theme={theme} config={config}>
      <YourApplication />
    </UIProvider>
  )
}
```