Red the color at the end of the visible light spectrum looks good on everyone. Don't you think?
I am more of a fan of green.  That would leave us only one primary color: Blue.
But the dominant wavelength of red is approximately 625–740. That's impressive!
Hey, i have seen many a red sunset, and the wavelength you have mentioned is the reason.
I'm sure those sunsets were brilliant yellow-tinged scarlet and vermillion. The most beautiful red.
Ah yes, vermillion.  I like that almost as well as scarlet.
The red sky at sunset results from Rayleigh scattering.