Does anyone have the XXR 535's in chromium black installed on their Mini's?

I'm wondering if "chromium black" is the same as a "gunmetal" (dark metallic silverish)?

Also, aside from installing them, is there any way to find out if they are heavier than stock 17" wheels, and if so by how much?

 

Chromium black appears to be a dark grey, you might check if there are any local sources of XXR wheels in your area so that you can see it in person.

XXR 535 in 4x100 bolt pattern-
17x7" et35 centerbore 73.1, approx weight 20.2 lbs
17x8.25" et20 centerbore 73.1, approx weight 22.65 lbs

 

I had some Kyowa KR210's in "hyperblack" on my kia soul a few years ago. I'm figuring it's probably the same think. A dark silver/gray but slightly shiny.