The aura color associated with Dream Magic is indigo.
The safest means of using the Dreamworld is by entering it while asleep, leaving the body behind resting in the physical realm. In this state, death or damage that would otherwise result in unconsciousness will simply force the Dreamer to wake up, and they will be unharmed.
A Dreamer can enter or alter the dreams of another sleeping person, or draw them into a dream of their own.
Much more dangerous than simply sleeping and dreaming, a powerful Dreamer can physically enter the Dreamworld. The risk pays off in being capable of performing greater acts of magic.
By physically crossing the Dream, a Dreamer can use a form of teleportation similar to that used by Motion Magic. However, since Dream Magic is so rare, few people think to ward against it, and fewer still know how to do so. Thus, a Dreamer can use this to bypass wards that would normally prevent teleportation into an area.