A few days after I sent my orange version of this Darkness cover to Joe, he tells me they'd asked JJ Kirby to give it a shot on the colours as well. Joe also sent me a sneak preview copy of JJ's colours and said "See what you can do with yours now."
So I got back into my version, ditched the orange theme and using JJ's a cue redid my colours to match somewhat and fired it back off the Joe.
Personally I think that my colouring style is a little more refined on the detail than JJ's so this matches his colour scheme but still has my methodology to it overall. Not to worry though because as I said in the orange version that I originally did it looks like they're not going to use it anytime soon and if they do it'll probably be JJ's colours anyway...
I think it's a great honor to have someone like Joe approach you to begin with! Your work is pro, Sean. Unfortunately it's the politics of the biz you have to get thru.