How to change background color of sticky header

Hello!

I’m trying to change the background-color of the Sticky Header, but I’m no finding where is this.

I just look through the whole theme files for something like:

#header.stuck or background: rgba(255,255,255,0.95) !important;

But no luck. I still already tried to put some extra css with !important but I’m not able to overwrite the property.

Where is this property set?

Thanks
Angelo

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