Behringer CAT "After Hours" aftermarket panel overlay.

t’s the CAT as you’ve never seen it before! This overlay brings the elegant and intuitive colour-coding from the popular ‘After hours’ design to the Behringer CAT, for that same ease-of-use when patching and tweaking. The low-key background keeps the contrast low (ideal for those extended work sessions) and the modules are clearly separated by gutters, which helps with navigating the front panel. The colours bring the modules and patchbay together, making for quick and intuitive patching.

https://heinakroon.net/product/after-hours-cat/