Behringer Wasp "After Hours" aftermarket panel overlay.

The popular After hours – now available for the Wasp Deluxe! Its subtle colour-coded design and low-key background keep 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 – especially useful if you already have other synths with the same colour-coding.

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