I know someone who can see auras. That's really all she can see, actually. The shape of their aura... Pretty interesting, if you ask me. She told me my colors and I simply googled them. They seemed to be pretty acurate too. Never doubt the power of google.
1.Situate the person in front of a very softly illuminated PLAIN WHITE background. A color background will change Aura colors, so you need additional knowledge about combining colors. Some combinations of background and Aura colors may cause misinterpretation problems.
2.Choose ONE SPOT to look at. The middle of the forehead is VERY GOOD. This is a location of so called Brow Chakra or the Third Eye. In some cultures (India) they put a mark on a forehead. Such a mark in ancient times could mean the invitation to look and see the Aura.
3.Look at this spot for 30 to 60 seconds or longer
4.After 30 seconds analyze surroundings with your peripheral vision, while still looking at the same spot. Continuing the concentration is most important. Resist temptation to look around. You should see that the background nearby the person is brighter and has a DIFFERENT color than the background further away. This is your own perception of the Aura. The longer you concentrate, the better you will see it. Remember, concentration on one spot increases your sensitivity by accumulating the effect of the Aura vibration reaching your eyes.
I can see auras too, though I need to focus to do so. I've found that aura colors can have a variety of meanings, mine looks like a crystal lattice of blue and green. Silver and white could mean any number of things, but none of them are bad. The only aura color to avoid is black, usually indicating a psi-vampire or something similar. I've found colors to indicate the basics of someone's personality, while the "texture" or shade can show their emotional state.