GNOME Extensions I Use for Accent Colors
The accent color feature was added to GNOME Settings a few releases ago, but there are still some things to be improved using extensions.
Auto Accent Colour
Automatically set the GNOME accent colour based on the user's background
I use Damask to change background photos, and I wanted a better, easier way to set accent colors based on that.
Accent Icons
Makes icons follow system accent color
Feeling bad about having blue folder icons all the time? This extensions fixes that, and sets folder icons' colors automatically to match your system accent color. Not only that, it even changes the app icons' colors, such as Nautilus, GNOME Tweaks, Fractal, etc.
adw-gtk3 Colorizer
Colorize adw-gtk3 straight from your system color accents
I use adw-gtk to make GTK3 software match LibAdwaita (GTK4) theme. Some GTK3 apps like Evolution needed to match my accent color. This extension does the work quite perfectly.