I've started giving all of the colors in her mane their own outline color like she has in The Movie instead of the darker-blue-for-all she has in the show, and also started giving all my Ponies eyebrows (which they honestly should have had all along), and since eyebrows end up being just a single line of the mane/tail outline color in all but closeups, it made sense to me that her eyebrows would be multicolored like the rest of her hair.