```js
// Button.stories.js

import Button from './Button.svelte';

export default {
  title: 'Button',
  component: Button,
  parameters: {
    backgrounds: {
      values: [
         { name: 'red', value: '#f00', },
         { name: 'green', value: '#0f0', },
         { name: 'blue', value: '#00f', },
      ]
    }
  }
}

```