Theming - Css Color filter vs alt icons

[Jopp-gh]

I was wondering how folder color switcher applies colors to folders. The question arises because not all icon themes support the folder color switcher.

It seems, folder color switcher "switches" to png or svg icons.

Since Mint uses CSS for theming, my question is if a css filter wouldn't be a better option to "rotate colours" instead to change folder icons with image files.

This way folder color switcher would be compatible with all kind of icon themes. In CSS, it's easy to add a filter to desaturate and brighten, then rotate colours in one shot.

Adding colours to folders is very useful to highlight the status of projects in progress.

I am not too fond with the standard icon theme and prefer to use another icon theme (ePapirus), so this post.

What could I do meanwhile to re-enable the folder color switcher? Copy alternative folder icons in ~/.icons/ ?

I've almost no clue how to theme Linux Mint, all I want is to get the folder color switcher back but in my unsupported icon theme.

I added this request also to: (not sure if the discussions thread here is better suited for my request)
https://github.com/linuxmint/folder-color-switcher/issues?q=is%3Aissue+is%3Aopen