Your spot on, they do look like a Black Blob.... on my T6. I've gone Black several times with various banded steels and I just cannot pull them off on mine, but Red is a different animal and although Black banded 19s loose a little of their visual depth in Black, they will suit your T6.
The colour you've gone for, Jamie did my daughters wheels in for her Mini, which is also Black, but that colour he does is pretty cool, and works on her Mini because she has the standard Black arches to break up the mass of Black.
Only time will tell if you fall in love with them in Black, but you have my vote.
Just the 4-6 week wait now!
as soon as they arrive I will post some pictures.