Taskbar's backgound icons not changing with theme color

[zenzen]

If you feel like tinkering for a little while, you can implement this yourself:

Tweaking Zorin Appearance

I have a stupid question, and it's not important, I am just so curious about it. How can I tweak Zorin Appearance and add new accent color? I have a dark folder icon set base on Zorin icon sets, I want to add it to Zorin Appearance. I couldn't find the app to check how it is. [Screenshot from 2024-09-23 22-55-42] Thanks for your time.