The wavelength range of 420-380 nanometers actually falls outside the visible spectrum of light.

Here's why:

* Visible Spectrum: The visible spectrum of light, what humans can see, ranges from approximately 380 to 750 nanometers.

* Violet: The shortest wavelengths of visible light, around 380-450 nanometers, appear violet.

* Ultraviolet: Wavelengths shorter than 380 nanometers fall into the ultraviolet (UV) range, which is invisible to the human eye.

Therefore, there is no color associated with the wavelength range of 420-380 nanometers as it lies within the ultraviolet spectrum.