I've just started to mix and match, but I'm not sure whether it works. What does anyone else think?
As for green or red, I prefer green when I'm at home and red when I'm away from home, which is just about every weekend. I find it's so much easier to eat red when out & about. I also find I prefer red in summer - barbecues are so much easier, especially with so many people doing Atkins these days (well they are over here in France, anyway)