Violet light is at the higher end of the visible spectrum, with a wavelength ~380-450 nanometers (in experiments, people have so far seen to 310 nm). ... Objects reflecting spectral violet appear very dark, because human vision is relatively insensitive to those wavelengths.

Can the human eye see violet?

Purple is a mixture of colors, like white. If you mix blue light and red light, your eye will see purple, but in reality, it's just a mix of blue and red. ... That's why red, green and blue are the primary colors: The human eye can really see only these three colors.

What light is invisible to the human eye?

Visible light has wavelengths ranging from about 400 nanometers to 700 nanometers. Wavelengths shorter than 400 nm, or longer than 700 nm, are invisible to the human eye.