Describe the bug

When you run the Vitest addon you can end up in a situation where you have color contrast accessibility issues based on your existing theme configuration as the values are hardcoded without a way to override via a class.

Reproduction link

N/A

Reproduction steps

1. Run the Vitest plugin.
2. Activate an error or warning state.
3. Depending on your theme you may end up with color contrast issues.

System

"@storybook/addon-vitest": "9.0.0-beta.11"

Additional context