[bug] Light theme colors contrast

Feature description

Hi,

I wonder if the contrast should be increased for some of the default colours to improve accessibility?

Perhaps white text on a darker red background?

Affected component/components

Button, Alert

Additional Context

https://webaim.org/resources/contrastchecker/

Before submitting

• [X] I've made research efforts and searched the documentation
• [X] I've searched for existing issues and PRs

You're absolutely right. I am currently working on a themes page, it will have pre-built themes and a theme generator with colors that are automatically contrasted using adobe leonardo under the hood. Dropping soon