TAST (Take A Stitch Tuesday) stitch #124 is named Closed Herringbone and is perfect for reversible embroidery.
On the one side you have the tight Herringbone like a braid, on the other two lines of neat Backstitches. If the fabric is light enough you will then see the Herringbone on the other side through the fabric. This kind of embroidery is called Shadow work.
On my sampler I have only shown the Herringbone itself.
Pintangle to learn, share and enjoy.