An aura is the light said to surround a person. Seeing one in a dream is read as sensing someone’s mood or character beyond words, and its colour as the feeling that person leaves.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.