I just spent some 10-15 mins playing around with a 65% layout...
Since this was just a quick draft on an idea, it's not fully formed, but I was generally thinking of a white top and bottom row, with orange accent keys. These ideas are born from the lovely symmetry of the HHKB layout, which doesn't work as well on a 65%/75%/TKL in my eyes.
Anyway, perhaps this will give you some more inspiration which will in turn give us more renders, but I am extremely interested in an all-white or all-orange (with accent keys in either colour) bottom row.
Edit: Please don't make me switch to HHKB. 😁