I'm making a fall birthday cake and want to know what icing colors to mix to get some pretty fall colors. for leaves and flowers, etc. Any help would be appreciated! Thanks.

Burgandy mums are always pretty. Burnt Orange (orange with a bit of brown to "muddy" it up), Darker Sage Green, Golden Yellow, Red, and of course brown. You could even go with a mauve.

Juniper and Moss green make great greens. Terra cotta for orange, and golden or buttercup yellow.

I made golden yellow mums for a thanksgiving cake Im doing

Thanks for all your thoughts. That helps!