Read more: These Viral Curtain Alternatives Offer Chic Solutions That Won't Break The Bank Room darkening curtains use a less ...

Unlock to see our ratings and compare products side by side For the Amazon Basics Room Darkening Blackout Curtains, the lightest color tested was white, and the darkest color tested was black.

They come in all kinds of materials with varying degrees of effectiveness. Densely-made room darkening or "blackout" shades ...