So yesterday I went to Calloway's nursery in Dallas, Texas and bought some succulents. Among the plants I purchased was a medicinal Aloe vera plant. The weird thing is, the plant is almost entirely a deep purple color. The only thing not purple on the plant is the dead leaves at the base of the plant (old growth) and the very base of the new growth in the middle of the plant. I did some research and didn't find anything like it on the internet. I found where people had their leaves turning a light shade of purple on the tips, but this plant is almost entirely purple. Is it sunburn or something? I mean, the plant is still alive and probably still producing gel (I haven't broken off a leaf yet) but the color is just perplexing. The plant is rigid and stiff and the leaves point up like a normal plant. It is planted in a foot tall ceramic pot with gravel and woodchips at the bottom. The soil is a mixture of cactus mix and soil from my garden, which is slightly sandy. It has been purple since I got it from the store yesterday. The only times it has been watered were yesterday after I planted it and today when it got caught outside in a heavy downpour that lasted about 5 minutes. It is kept under the speckled shade of an Oak tree. I am in plant hardiness zone 8a. It shares a pot with a small Crassula portulacaria and a small pencil cactus (Euphorbia tricalli. Funny side note, I'm actually kind of afraid of the pencil cactus because of what I've heard about it's latex sap. I'm dreading the day when I have to prune it). Why is it purple, and what can I do to make it green?

Pictures:
https://drive.google.com/file/d/0B-WyLrEMJyLhY01EV3JCNFdnNXFCTTQtUjBVYnNUeEE5aDlB/edit?usp=sharing

https://drive.google.com/file/d/0B-WyLrEMJyLhTmFiS0lZWWZmSW9Kd1MtbllMZXRJMERWcGhj/edit?usp=sharing

https://drive.google.com/file/d/0B-WyLrEMJyLhRmRsSGtPTnQ2bS1Od2IwZXJUZWFjTU1ZTnhv/edit?usp=sharing

https://drive.google.com/file/d/0B-WyLrEMJyLhTzZZa21lX1Rhbm1FNGt2UXY1UGc4SUV6SzFz/edit?usp=sharing