button's classname passed from UI doesn't take precedence(unable to change color) about themes HOT 3 CLOSED

You are probably running into a specificity issue with your CSS.

Most button variants have 0, 2, 0 specificity on the rules that define the background color (for the regular rest state, at least):

The best way to override base styles in your example is to create a matching rule in your CSS:

.my-fancy-button.rt-BaseButton.rt-variant-solid {
  background-image: ...
}

Please note that we don’t encourage component customization like this as it's fragile because it relies on internal implementation details, which may change down the line. In your case, you'd have to also recreate all the button states.

Your safest bet is to tweak the base CSS variables that we provide. Otherwise, if a specific Radix Themes component doesn’t fit your use-case, it's always easier to create your own component which you’d have full control over.

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You could also use CSS Layers to control specificity. For example, with panda-css in index.css:

@layer reset, radix, base, tokens, recipes, utilities;

@import "@radix-ui/themes/styles.css" layer(radix);

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I don't think that's how this all works. Would need to see what your actual classes contain, but if you add a normal css class (without variables), of course the child elements aren't going to receive the color.

For your approach to work, your class would need to contain the proper color tokens used by Button.

Could be wrong, but that's how I believe this works.

Also, (as someone who is just learning all of this), I wouldn't use that approach. I'd follow what is described in the docs and set the accent color directly.

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