When I first think of violet, I think of royalty. More interestingly, it is "the most powerful wavelength of the rainbow". As violet changed over time in terms of dyes and cost, its symbolism of nobility and luxury stayed constant.
To further the interesting fact about it beiong the most powerful wavelength, "science has revealed that violet is the most powerful visible wavelength of electromagnetic energy, being just a few steps away from x-rays and gamma rays"
We can also circle back to shades meaning different things:
~ Light violet --> "light hearted and romantic"
~ Dark violet --> "intellectual and dignified"
Some interesting facts...