If the emblems are not real CF, go with gloss black to match the rest of the trim.
Advice: buy some thin painters tape and tape around the existing numbers. You need to take some Goo Gone to get rid of the residue when you take the old ones off. Re-center the new numbers in the taped off boxes and you will have the exact same placement.
I went with gloss black and they match my trim and kidneys perfect!