I agree with PaperPrincess = pick a multicolor that you like and go from there. Another trick is to pull more than you think you'll use, put the bolts together (lay them across the top of the shopping cart if necessary to see them together) then squint your eyes to see how they all fit together...while looking through "squinty" eyes, you'll be able to see if something looks too weird for the combination, see if you have too many darks or lights, etc. And move the bolts around so that you see different fabrics together.