I have a wedding cake due and her colors are ivory and orange. But it is not a bright orange a deep orange. I tried the wilton orange and it is too bright. I was thinking adding a tad of brown might darken it? any suggestions? thank you!

Here is a great color mixing chart. I hope it helps.

http://www.candylandcrafts.com/colorchart.htm

They make a tera cotta color that is deeper.