I ordered 4 of these in taupe, and the color is as pictured. It blocks a good deal of light, but not all (as expected). It is not thick like thermal curtains (no vinyl backing). Note that the back of the curtain is dark brown, which helps with the darkening but may absorb heat from direct sunlight.
I wanted a panel with the thermal backing, these did not have it. The description was miss-leading. You need to have better descriptions of the item and include close up photos of the material and a photo of the back sides.