Update:
If I wasn't clear, you can choose the COLOR combination at pcpartpicker to filter down the choices.
So if choosing Z170, click that, then filter by Gold/Black.
You can also do the same for the DDR4 memory (Black, Glack/Gold, or Gold). The closes I found suitable was THIS but I didn't look too hard (it's a 4x8GB kit):
http://pcpartpicker.com/part/corsair-memory-cmk32gx4m4a2800c16
Update:
The above kit has RAM coolers which are painted RED on top. Kit was listed through pcpartpicker as Black or Black/Gold so since color seems pretty important you'll want to choose carefully.
If MODDING slightly is okay, there's probably some small things you can do like painting ram coolers or whatever (with the proper paint) but that's not...