@tracedw did me a beautiful shawlette for a craft swap in a navy and oatmeal/ beige trim, I think it was in cascade yarn? the navy is a semi solid and is just beautiful, it has a lustre to it and looks great with jeans, is kinda neutral really.
I think two semi-solids would like lovely, you could do navy blue with a khaki trim. Either that or the light/dark denim blues in the third and fourth photos on the pattern page looks lovely.
You could always get customs made in whater colours you chose.
@northernruth Both of the yarns for that shawl were Colinette Jitterbug,the blue is Velvet Damson and the neutral is Oyster Blush, gorgeous yarn to knit with