```md
<!-- Button.stories.mdx -->

import { Meta, Story } from '@storybook/addon-docs';

import Button from './Button.svelte';

<Meta 
  title="Accessibility testing" 
  component={Button} 
  argTypes={{
    backgroundColor: {
      control: {
        type: 'color',
      }
    }
  }} />

<!--
 👇 Render functions are a framework specific feature to allow you control on how the component renders.
  See https://storybook.js.org/docs/7.0/svelte/api/csf
  to learn how to use render functions.
-->

## This is an accessible story

<Story
  name="Accessible"
  args={{
    primary: false, 
    label: 'Button'
  }}
  render={(args) => ({
    Component: Button,
    props: args,
  })} />
 
## This is not

<Story
  name="Inaccessible"
  args={{
    primary: false,
    label: 'Button',
    backgroundColor: 'red'
  }}
  render={(args) => ({
    Component: Button,
    props: args,
  })} />
```