First I cut strips for the front (blue) at 1" and the back (red) at 2" Cut as many strips as usual.
Join the strips as usual for a regular binding.
Now sew the long strips together using 1/4" seam.
Set the seam by pressing it.
Press the seam open.
I press the right side also.
Sew the binding on the front of the quilt. BE SURE the back binding color is on top. When the binding is folded, this side of solid color will be inside of the fold. Use a full 1/4" seam.
Here it is after I seamed the binding to the quilt.
Fold the binding to the back and pin. So you have red binding on the back.