Magenta is a color that has no measurable wavelength. We see it by a compensatory trick of the brain: All visible colors have specific wavelengths which distinguish them from the other colors on the color wheel. Magenta, because it doesn’t exist on the visible light spectrum, doesn’t have one. Rather, it’s something our brain creates.
Some have been noting that magenta is the chosen color of technology as it builds the New World (e.g., T-Mobile's color), and its growing use signals the Singularity and the birth of virtual reality. Watch the video below (celebrating magenta, serpent energy, DNA helix) and read this post from Alison McDowell and this one by Stephers. A just-released example of magenta celebration here.