I used a film die cut to size to cover my rear reflectors (which light up). They don't obscure the light but make them dim enough to see and stay legal (I think). I got them from a forum member but forgot who it was.
I wish I could have got a sticker overlay or something,
I know the website dansdecals.com and they claim to be able to match any color, but good ol fashioned paint never hurt
Besides it gave me another reason to play with the car,
I ordered a few other small appearance mods that should be here next week,
But these are for under the hood Can't leave that masterpiece of an engine alone! needs "tweaks".
I think the tint film Greg mentioned would work well with your color, Ive seen people even use limo black window tint an it come out nice on black Zee's