Hi guys,
I would highly recommend the guppydesigner.com website. (sorry, if i am not allowed to do that, mods please remove my post, but please dont ban me!!)
The Guppy Colour strains book by Phillip Shaddock is Pure Gold when it comes to genetics and cross breeding for variations. Worth every cent and mine was delivered within a week.
Alot of the females carry the genes for tail colour, i would cross your strongest/best male to a female with bright red fins, maybe a full red. The Hb should be dominant from the male as body colour and the fins should hopefully come from the mum. someone may have a suitable female for you.
I think if you use an albino as a cross you may make your half black more a dull grey, but not totally certain of that.
I am only just coming to understand the genetics of the wonderful guppy but will let you know if similar crosses i am doing bring the desired outcomes.
All the best.
Cheers,
JamieC
PS. May have some wilds in the near future, if interested pm me.