Green days are dead easy. Just steer clear of meat and fish, and remember to have 2 Hex Bs, and 1 or 2 Hex As. Get your head around that first - the Hex As and Bs are the same as EE.
Then, if you do want some meat with a meal, you can have it as a Hex B, just double check it on the list that Queen Bizzle has kindly written up. Or, check the amount and syn it.
Red and Green confused the hell out of me to start with, but I think it's easier to just forget the extra B choices on each plan until you've got your head round the basics. Hope that helps!