Help! I have a closet full of mis-matched black suiting separates.

Because of my size (petite and plus) and a bit of a shopping addiction I have accumulated a lot of quality black or dark gray suit separates. The problem is that I can't seem to match up the skirts, pants and blazers into actual workable suits!

For example: I have lovely charcoal pinstripe Calvin Klein skirt I snagged from a clearance rack for just $5.00, but have no idea what to pair it with to make a suit.

Any advice on how to make a stylish suit when the top and bottom colors (who knew there were so many shades of black!) are slightly off?
I'm worried it will just end up looking sloppy .