Having tried to photograph purple flowers, I can confidently say that the human eye+brain combo messes around with the colors a lot. You can spend a lot of time trying to take the most authentic photo you can think of, but you’ll somehow still be dissatisfied with the end result, because that’s not what the flower looked to you in real life. Naturally, you’ll assume that your experience of the colors is exactly what real life is, but your camera still somehow comes to a different conclusion. Most likely, that’s because the camera doesn’t do all the fancy color corrections and distortion your mind does automatically. It’s also possible that cameras are really bad at seeing shades of purple.
Fun fact: These fancy automatic corrections also fail under certain circumstances and produce interesting visual illusions.