I do not tie flies, but as a life long bass fisherman with mostly conventional, but lately flies to some extent, I would recommend black and white as they have been most productive for me over the years. The bottom of the fly/lure is most visible to the fish and I believe white imitates the light belly of frogs, while black /dark colors cast a better silohette(sp?) in low light conditions.
And I second gfen's suggestion of using a Gurglur. Fairly easy to tie, effective and floats well. I can spin hair, but the convenience of foam has me tying more foam flies than hair flies. And no complaints from the bass.
I picked up the fly tyers grab bag at Cabela's a while back and it usually has some brightly colored hair and feathers that are mostly not used by trout fisherman... they are however pretty good for bass and salt. For like $15 it will atleast get you started.