I'm not sure if it was the sunshine and the denim that made me feel like it was actually 25º outside; when in fact it was very cold. To be honest; double denim looks can be quite tricky to pull off but if you know how to do it, they can look great. If you want to go for a double denim look I reccomend that you make sure that they are at least 2 or 3 shades different in the same kind of blue. That would keep the harmony between them. And another trick is try to show a bare ankle it would give your look a more relaxed and fresh vibe.