I added and added brown wilton gel color last night and tried cocoa and green and red.
did you already have chocolate BC or did you start w/ white?
i use brown and black to get dk brown. the rose cake in my photos was made using those two, but make sure you add the black a little at a time or you just end up with black.
I generally replace about 1/2 cup of icing sugar (takes about 8 total) in my crusting BC with cocoa. Then it takes a lot of brown gel colour.
Sorry, but that's all the tips I have.
thanks for your help I added cocoa and a whole thing of brown and a little black it wasnt as dark as I would have liked but I think it looks good This is my first 2 tier cake for my friend's daughter's 4th birthday I will post a pic soon. She will take a pic of it at the party tomorrow