With black backing. Besides, all curtains have black lining in middle. So, light colored curtains also 100% blackout. What color is the backing？Iight colored curtains 100% blackout or not？. 1 100% BLACKOUT.
Manufacturer LEMOMO. LEMOMO Stylish Blackout Curtains. Blackout Curtains and Privacy Maximization: Curtains impede 85%-99% light and UV ray(Darker colors more better). Perfect thermal curtains for bedroom, living room, kids room and nursery room.
Superior Blackout & Energy Savings: Black out curtains feature triple-weave technology for professional-grade light blocking. Dark colors curtains block 85%-99% of sunlight; light colors curtains block 65%-80%.