I got these curtains in the slate color and was worried they would be too gray, but they are the light blue I was hoping for. The material is beautiful and they definitely block light well. My partner says they work well -  he sleeps during the day to work nights, and he has difficulty sleeping if there is any light in the room. Definitely recommend a thicker curtain rod (about 3/4 inch at least) that bolts to the wall as they are heavier than standard curtains.