Purple Navel in dreams
The scar left by the umbilical cord — the literal mark of the first attachment.
How purple changes the reading
Purple colour places the symbol between hot and cool — a reading that has both calm and intensity at once. The dream often uses purple for symbols that do not fit the usual categories cleanly. Take the reading more seriously than you would otherwise; the colour is asking you to.
The base reading of Navel
A navel in a dream is the dream's image of the literal scar of the first attachment. Every body carries the mark of where it was once connected to the body that made it; the dream brings the navel when something in your life is returning you to the question of where you originally came from. A navel observed neutrally is the dream telling you the origin is acknowledged and at rest. A navel that hurts in the dream is the dream noting that the original attachment is sore — that something from the earliest part of your story is back in the room and asking for attention.