Got the white curtains with the overlay - even with white, the amount of light that came through was  minimal. Light definitely came through, for 100% blackout you'll need a dark color, but I was happy because I have a small room and didn't want a huge dark curtain to make it smaller, and I slept better. The amount of sound that came through was definitely less as well, which is what I was mainly concerned with as I live on a busy street. Makes a big difference when the curtains are completely closed, and I started sleeping better. Would buy again!