I love gloss black Prets, but not as much as the oem silver Prets. Mr Ex’s (Exonian) description of them is spot on. They actually a difficult colour to describe, very different to ordinary silver, darker, but not anthracite dark, and it’s that blueish tinge that sets them well apart. Quite simply the colour suits the design beautifully.
I know of a fair few R owners with gloss black Prets and they despair of how dirty brown they look so quickly. Prets themselves, whatever the colour pick up brake dust etc worse than any wheel I’ve had in the past so factor that in when deciding, because black Prets will pretty much look brown a lot of the time.
If you are going to get them powder coated gloss black, as SRGTD suggests, get somewhere very reputable to do the job. Lepsons have powder coat refurbed a couple of my Prets (oem silver) and the finish is noticeably superior to the factory oem finish, to the point I should have had even the unmarked ones done. And their colour match was absolutely spot on, so they should be able to match the oem gloss black without any trouble I would think.