Logo Colour Needs Inverted

Site URL: https://willow.pet

Hi,

My uploaded logo for my homepage is white which is fine. On other pages the background is white so the logo isn't visible. I do have a black version of the logo but need some way of displaying the correct logo colour based on the background.

Any ideas?

https://christyprice.com/squarespace-tips-tricks/how-to-invert-logo-single-page-squarespace

Thank you so much!