I think the handle wasn't painted per se, rather, I think they did some kind of bonding process so that it wouldn't rub off after a few pulls. Perhaps something akin to anodizing or powder coating.

If you want to *paint* it, you're unlikely to be able to find the exact materials and color, so I say just do your best to match it with semigloss black.

Subtle shades of black and white are hard to get right anyway. My MK2 fascia doesn't exactly match the handle. They're different materials and I just accept that they're different shades of black and live with it.