I have only brewed one once and it didn't turn out great. I think the malt bill was probably close but I didn't use enough hops. It was a while ago before I understood how much hops a good IPA really needs. I rarely brew IPAs of any sort now because I am too cheap.
I think blackprinz, midnight wheat, or dehusked carafa would be the way to go for more color and less roast.
Wookey Jack, which is one of the few that I have had and really liked, uses the following ingredients according to their website:
malts
Pale Malt, Malted Rye, Dash of Cara-Rye, Midnight Wheat from Briess, De-Bittered Black Malt (Weyermann - Germany/Patagonia malting - Chile), Dash of Wookey dust
hops
German Magnum (bittering), Citra & Amarillo (flavor/aroma and double dry-hopped)
I am shooting over to a brewery after work that got gold at 2014 GABF in American-Style Black Ale for their Black IPA. I will try to remember to ask them out of curiosity.