[Feature] Toggleable Themes

[lndncole]

Describe the feature you'd like
It would be cool if the user could toggle the theme. Or if the theme toggled when the persona updated.

Describe alternatives you've considered
There may be a library out there for this.
We could define primary and secondary etc etc colors and styles. Then define user person styles and apply the user persona classes based on some user interaction.

Additional context
Would just be a cool feature.