A look at the CEI chromacity diagram will confirm this, and in deed Magenta has a virtual wavelength centered around 500c nm. situated in a band that extends from 700 nm to 560c nm. The "c" indicates these colors are complementary to the color that normally occupies these wavelengths,- Green.

Since Magenta is the complement of Green, this is partially logical. It is not completely logical as it has been observed that every wavelength in the visible spectrum has its own color. 500 nm cannot be both Green and Magenta.

This should tell us something. Namely there is more to the visible spectrum than we think. While it may not be Earth shattering, it is a curiosity that needs addressing.

The problem is that Magenta needs to be the only color between Red and Blue, and it simply isn't.  Or is it?

At this point it may be instructive to stop looking at the trees to contemplate the forrest. The trees are the colors, while the forrest is the visible spectrum. What Dr. Land did when he devised the CEI color system, was to bend the Blue end of the spectrum around in a horseshoe to meet the Red end with a gap for Magenta.