Do the make the icing tint beige? If not, would you start with a little dab of brown?
tan, beige, off white, ivory, champagne, fleshtone ..... it's all the same to me.
I use the "Fleshtone" coloring sometimes ... adjusting the quantity to the shade I'm looking for (not that there's much difference).
For about half of these colors, I just use brown vanilla.