I need to make a cake that uses black fondant and black buttercream. I ordered the wilton color spray but it's way to light. I don't have any stores near by and have to order everything online. This cake needs to be ready for tomorrow. Anyone have any ideas? Please Help!

If the spray is too light, go over it. Let it dry completely before adding another layer of spray.
Also it probably will darken some as it sits. Most colors will and the darker the color the more it will darken.
I take it you already have covered the cake in fondant &/or b'cream. No chance of adding color to them? If you can still work color in.....make them a gray, as dark as you want, then spray them. OR you can make them chocolate, or blue and spray that.

I had the same dilemmna! I need to make a strip of fondant black for a "sushi wrap" Thanks, kakeladi!!!

I ended up trying the color gel and thinned it out with vodka. Then I used the airbrush. It worked great! Thanks for your help.