I added a pink 1" border and then a blue 4" outer border. The blue border looks like it's the same as the sashing, but it isn't. I didn't have any more of the sashing fabric left (it was actually 'sky' left over from a panto set about 6 years ago, so I'm surprised there was this much!) so used the bright pink to confuse the eye into thinking the blues weren't too dissimilar. It worked, didn't it?!