Is there a convenient way to just change the primary color without preparing a whole theme json file?

[PleaseDont]

Is there a convenient way to just change the primary color without preparing a whole theme json file?
Just like shadcn:

[l0uisgrange]

I'm looking for that too

[huacnlee]

You can just override by use Theme::global_mut()

[PleaseDont]

I think the design of the theme file is a little complex, as it requires setting 4 colors for primary color.
When the theme file doesn't explicitly specify the hover and active color values, could the system automatically generate them by adjusting the alpha value or applying lighten/darken methods?
OK, maybe I just need a UI designer.