It's made using Robert Kaufman's new Chambray Union. There are eight different fabrics, each of which have a slightly different texture. The fabrics have a really nice feel and drape, making them great for apparel but, of course, I put them into a quilt. The white is Essex cotton/linen.
The 72" x 72" top is made with nine 24" x 24" Knee Socks blocks. Knee Socks is a block pattern I wrote for the Week of Using What You Have during 100 Days of Modern Quilting on the MQG blog.
The block design uses contrasting fabrics to create the graphic stripe design. In both of the pattern examples, I used solid white for all of the light fabric/background, but you could easily substitute a variety of low-volume fabrics. In fact, it would probably make a fantastic scrappy value quilt. If you wanted to go that route, you could just ignore the instructions for cutting the solid background fabric and double the amount of the constrasting stripe fabric, making one set of dark stripes and one set of light.
For the blocks in my Preppy Knee Socks quilt, I substituted a pop of Kona Lipstick, Citrus, Cyan, or Indigo for one of the white stripes in each of the block units. The brighter solids contrast with both the white and the more neutral chambrays that comprise the rest of the stripes.
I know someone who will be disappointed if I don't also mention that the original block design was inspired by the rainbow stripe-tastic video for The Commodores Lady (You Bring Me Up).