These are my favorite curtains by far. I've had many different styles, colors and material curtains in my bedroom and I can honestly say I think these will stay for a while.  They keep out the sun in the mornings, so yes I would say they are blackout curtains. If you want it any darker then you may as well buy black or navy. Beautiful design great weight and material, and will fit in with any comforter I have. I have the white background with the gray design.