Colorado Blue Spruce - Picea pungens - is a wonderful evergreen addision to any landscape. They have wonderful color and a nice triangle shape. The needles are short and hard, and they produce an appealing cone. They will shed some of their needles but not near as baddly as pines. You need to make sure you have ample room for them though, because they are not a small variety of tree. The can get about 25 feet and 30 to 60 feet high. They are a classic tree used for Christmas. And by far one of my favorites.