They didn't have any of the hi-viz yellow of these "running shirts" at our Target (and it looks like the website is currently sold out, too). They had a neon yellow/green in a heavier material, and it had dark gray under the arms and on the sides. I tried one on and didn't like the material.

The yellow is a good visible color, too. Probably better in total darkness than the orange. The orange really lights up in even partial light, though.