Finally found exactly what we wanted and needed.
I love natural lighting, so I can careless about having slightly see-through curtains. My husband, on the other hand, wanted and absolutely had to have blackout curtains. When and if we walk pass our windows from the inside and outside, you do not see the person's silhouettes. Definitely blackout. I don't know how, but they don't collect dust or change in color with the sun shining on them hours a day. I'd recommend and purchase them again. The color is exactly as shown as well. We have grey walls and dark floors, just so you have an idea.