I've played pipes at hundreds of weddings so I'm used to trying to blend in with tuxes.

It seems clear to me that the thing that blends in most seamlessly with men in black tuxes with black bow ties and black cummerbunds is a black Argyll jacket worn with a black bow tie and a black cummerbund.

Back in the 80's and 90's when I was doing up to 50 weddings a year I would bring a number of bow tie/cummerbund sets with me so as to match in with the wedding party. I had black, red, white, and teal (I did say the 80's!!).

Yes indeed I thought that the Argyll jacket matched in better than the PC. The PC was for white tie & tails events only, for me.

I also wore a Black Watch kilt because it didn't stand out as much as brighter tartans. Many gigging pipers today are wearing black-on-dark grey tartans and even all-black kilts for wedding and funeral use.