Doing a little measuring and calculating on the image you posted, the blue stripe is about 1/2" wide, and the double blue is a bit more than an inch and a quarter. So, if you wanted to pleat this to the stripe, about the only option you have is Wally's option "B", with the narrow green stripe centered in a pair of dark blue stripes. If you picked the right pair of blue stripes, the pleats could flash green when you walked, although the tartan is so dark that the color difference won't be all that noticeable.