Thanks for the reply. The colour came up Midnight blue when he put the order in the computer. The brochure says dark metallic blue. No big deal, the order is in now, so we are getting the blue.
I find the dark metallic blue a bit darker than I'd prefer, but I still like it the most out of all the colour choices. I'm hoping midnight blue is similar to the 2010 Silverados, which is a bit lighter.