I built matching black and white itx machines for myself and my cousin. Started off with b450i boards from gigabyte. It did not appreciate the R9. So I changed them to x570i, still aorus. 3900x, 5700xt, all water cooled by alphacool. Hard tubed. And I had to build two of them. Two of everything. I wanted something nice to look at. We're both too old for RGB so I went with copper plated Core V1 chassis to match some lovely keyboards and mice I found.
Here's a video of the hard tubing before the switch to x570 in January.
And here's the black one with white fittings.