I think my favorite shade of purple is more of a deep royal purple
Purple is a color between blue and red.
Do you know where purple falls on the light spectrum?
Purple can fall anywhere between red and violet.
Does purple has historical significance?
Purple
Purple is a color intermediate between blue and red. It is similar to violet, but unlike violet, which is a spectral color with its own wavelength on the visible spectrum of light, purple is a secondary color made by combining red and blue. The complementary color of purple in the RYB color model is yellow.
According to surveys in Europe and North America, purple is the color most often associated with rarity, royalty, magic, mystery, and piety. When combined with pink, it is associated
worn by most national and corporate leaders. 
In science.
In science Optics.
Violet is at one end of the spectrum of visible light, between blue and the invisible ultraviolet. It has the shortest wavelength of all the visible colors. It is the color the eye sees looking at light with a wavelength of between 380 and 450 nanometers.
In the traditional color wheel used by painters, violet and purple lie between red and blue. Violet is inclined toward blue, while purple is inclined toward red.