Mine have always colored up more as time goes on. But make no mistake, contrary to what some pictures will show, they are lavender, orange, and yellow. None of the colors are exceptionally deep. With the right camera angle and lower exposure, you can take some amazing shots. But in real life, they are delicate and light in coloration. Even the ones I saw at the Long Beach Aquarium of the Pacific. They don't have the solid deep colors of lyretails, IME.
hth
Here's a good comparison....sorry about the focus