Make Transparent sticky header then black when scrolling in Debut theme

Store Design
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1

Hello,

I followed this tutorial to make the header sticky : https://www.youtube.com/watch?v=sw5InHdTYc8

But now, I want to make my header transparent when it is at the top of the page, then black when scrolling.

I have already tried all the solutions on this forum but nothing works.

My site address is https://shopdemoryparis.com

The theme is Debut

Thank you for your help !!

2

Hello @Lorch75 Can you Please Explain Properly Your Requirement?
Your current store Header is transparent and sticky header its a black background so please can you detail explain what your requirement
Thanks