I went ahead and voted for black, however for full discloser the PCBs that I have had made were green.
Red is a good option, the Erhard PAS PCBs do look sharp: https://www.erhard-audio.com/PAS-NGCT.html
Red is a good option, the Erhard PAS PCBs do look sharp: https://www.erhard-audio.com/PAS-NGCT.html