The bindings on my quilts rarely are from the same fabric that I used in the quilt. I wait until the end and then audition several different fabrics and then when I decide cut my binding from that. I generally cut it 2 1/4 but sometimes 2 1/2 and join the ends with a 45 degree seam. I usually gravitate to a darker or busier fabric so will will show the dirt less as the edge of a quilt usually gets the most wear. Relax, you probably have something in your stash that will work.