How to style Accordion elements?

Hi! I don’t understand how to style the elements in my accordion.
The accoridon was premade, by Brix, looks nice in normal setting, but when I click on it in preview mode, the headers in the accordion turns to purple. And the box gets a purple outline… How do I change these? How can I activate the “clicked” state? I guess I just miss something basic.

(Tried to go through some Accordion tutorials but his aspect does not seem to be talked about… as far as I can see…) Any help or tips would be aprecciated.

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