Auras are made of energy. To see aura you're looking at it in an unconventional manner so the colors and shapes translate to your brain differently than would something solid and obvious.
Everyone views energy differently, what something means to you means something else to others. No one can tell you what you're seeing, you have to interpret the imagery yourself.
You can find tutorials online but those are only suggestions to give you a solid example of what you're doing.
This is something you have to figure out on your own by determining what purple, white, slashes, and anemones mean to you.