If no color exists than you may need to seed this rock with some good live rock. Any amount will help but the more the quicker it will transfer.
If you check the link to www.garf.org
they have what is called garf grunge which is a LS
that you can use to seed your tank. It is suppose to have several types of coralline scrapings within it. This may help to get the color and beneficial bacteria you want.
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40lbs livesand(bag from LFS
), 30lbs live rock(LR
2 O. Clowns
1 peppermint shrimp, 5 red leg hermit crabs,
4 mexican turbo snails, 15 nassarius snails
ricordea mushroom, candy cane coral,
super color polyps, hairy mushrooms
bubble coral, hawiian feather duster
coralife lunar 2x65, HOT magnum canister
10 Gal refugium(chaeto) & seaclone skimmer