Dye changes colour from the inside out, so it is read as deep change and identity being transformed. It can also stand for being coloured by experiences or influences.
When this appeared in your dream, what were you feeling?
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.