It looks like you also have one next to your post, I got the same as SilverVixen, surprisingly.
Something to keep in mind is that there are different types of auras. SilverV and I saw blueish-green(I saw more green then blue), but someone else(my fiance, for example) may see something different.
I don't know about SilverV, but I see what I call a "Spiritual" or "Alignment" aura. Green generally means you have good intentions, more green then blue means more good then bad, an equal mix of green and blue would generally mean confusion, more blue then green means more bad then good, blue alone means bad intentions.
A red aura is plain evil. So far I have only seen a red aura when someone was being affected by a Demon and that is why I don't trust Demons, as I have said so many times before I have yet to meet a good one.
A gold aura, which is extremely rare, has only been seen by me when someone is being affected by Angels and that is why I do trust Angels. I have yet to meet a bad one.
Another thing to keep in mind is that "evil" is a perception, what I perceive to be evil is based on intentions. If you intend to do something that would hurt someone in any way at all(emotionally, mentally, physically, etc), you do not care about the results of hurting them, and you do not have to do it, then that is evil. Good intentions would be the opposite, sometimes even putting yourself at risk for the sake of saving people from injury.