Copy and paste in Package Manager:
https://github.com/ARtronClassicStudio/ColorAccent.git
Wait for compilation and this will complete the installation of the package.
Select your URP-Renderer asset and add to it "Color Accent Renderer":
You only need to add it once, but you can also add more to increase the effect.
Next select your Global Volume and add "Color Accent" and turn it on. :
Effect settings are intuitive and easy, without any complexity.