CSS Styles
Colors
You can modify the colors either at the theme-root level or at any custom element level via any class you want to use staring with 'theme-' (e.g. 'theme-mod'). These are the CSS variables you can define, all other in-between colors will be derived from these.
Why is there only one accent color? I need more. – Because it's very easy to set this up by yourself. Just add a class, that overwrites the var(--cAcc) and make sure, it starts with 'theme-'.