I saw several pics where they tinted the cake board with color. How do you do this? Looked really neat.

I'm sorry, do you have an example? I am not sure of what you are talking about.

Were they covered with fondant?

http://www.flickr.com/photos/8594180@N05/1290646004/

not fondant, it said she tinted with coloring

Read it again, said tinted with food coloring

I use different colors of fanci foil. But they come that color.

Would anyone know how you'd do this??

AHas it been airbrushed maybe?

Bleh, why? A fondant covered board, or one with different colors of fanci-foil, or even a plain silver cake drum is a much better look in MHO...But if you must, I would say it has been airbrushed. Also, I would think it would stain it enough that you could rinse it after, otherwise, it is going to get everywhere.

AI just saw this post, but I agree its either been airbrushed or she got those Wilton coloring sprays and sprayed it. Not sure if it would come off being touched. But it looks cool though for the background of this frog.

Could it have been coated with a thin layer of tinted royal icing?  That would dry hard, but would crack easily on a thin cardboard base, so not sure how that would work either.  

In one of her Craftsy tutorials, Colleen Peters does the tinted royal icing cake board.