Perfect! Just what I needed. My daughters room has pink curtains with stars on them. They SAID they were black out. Obviously not! BUT I still like them. So I bought the blush Oslo curtains to go behind the original ones. And MAN! Just look at the difference. Really needed since her bedtime is 7 and the sun is setting later during the summer. 
Its also great for sound reduction. This window faces our street and it muffles the sound of the cars going by pretty well.