ArsTechnica has a great writeup debunking the recent “myth” that Magenta is not a color since it has no corresponding wavelength.

They (correctly) bring up the CIE Chromaticity diagram and discus the “pink-purple” line that shows colors that do not exist as any single wavelength, but rather as a combination of various interfering wavelengths.

Yes, Virgina, there is a magenta – Ars Technica.