I have this in three colors (navy, grey/teal, and magenta). The navy is the most vibrant/highest saturation color.  The darker parts are almost black.  The grey/teal is pretty but looks washed out/faded. The magenta is more in between, like a rug that's seen a bit of sun. 

These rugs are thin and flat.  We use them in a high-traffic hallway with several doors, which swing comfortably over these low-profile rugs without getting stuck or moving them around.  We did not buy rug pads, so I do have to straighten them fairly often, but it's not a very big hassle

All of mine easily lay flat.  I used a steamer on the most recently purchased one for a few seconds, and it lay flat instantly after that.  I've had two of them for a year and a half and like them enough to buy a third