Auras - The aura is the "colored energy egg" around you. Learn about it here. As well, this is the section you want to be in if you are looking for aura colors after a photography session.
Chakras - Understand & learn to view these energy vortexes. Each processes the energy of a different emotion.
Viewing Auras and Chakras - Virtually every one can learn to physically see the human aura to some degree. The trick is knowing what to look for & how to look for it.