One direction I'm liking is a darker turquiose based on one I've posted many times on my Facebook page as a great example of a tastefully modified Econoline.
When you look at the barkcloth sample I plan to use for the back window curtains and other areas such as the driver and passenger door panels, you can see how nicely it would compliment a darker solid turquoise color.
OPTION #1: DARK TURQUOISE.
OPTION#4: DARK GREY PUTTY.
This is another color I'm considering, a solid darker grey with just a tinge of green. Very unusual.