Here at Fat Paws HQ we love grosgrain.
It comes in a rainbow of colours, but printed or patterned grosgrain appears to be only available up to a depth of 38mm (1.5 inches). That means the 2 inch martingales are usually made with the main body of the collar in one colour with a cordinating or contrast satin lining and a printed grosgrain or velvet trim is applied to the contol loop.
If you think about it when you're out-and-about with your furry friend on a lead the control loop is what you mainly see . . .