```js
// Button.stories.js

import React from 'react';
import Button from './Button';

export default {
  title: "Button",
  component: Button,
  parameters: {
    backgrounds: {
      values: [
         { name: 'red', value: '#f00', },
         { name: 'green', value: '#0f0', },
      ],
    }
  }
};
```