Resale value shouldn't be affected very much by a non-original color. Especially on a musclecar. A brighter paint job will attract more potential buyers. If they want a more conservative color they can repaint it or keep on looking. Your pleasure should take priority over the attitude of the next owner.
If I'm thinking of the right color I think they had a flat black hood on the Cudas and Chargers that they used it on.
AL