How can I make my website header transparent?

[hardingmolly]

Hi I would like to make my header transparent so the image banner becomes the background of the header.

like this:

any help would be much appreciated! thanks 🙂

[Made4uo-Ribe]

Hi @hardingmolly 

Would you mind to share your store URL? Thanks!

[hardingmolly]

Hi, I've managed to get the header transparent, but I would like the header to have a white background when scrolling, are you able to help?

Here is the url: https://sigridlondon.com/

thank you!

[Made4uo-Ribe]

I can help for the simple css, but scrolling with background that needs a javascript.