Pyxplot Users' Guide: Color representations of the electromagnetic spectrum

6.6.1 Color representations of the electromagnetic spectrum

Two functions, in the colors module, provide color objects which approximate the color of particular wavelengths of light, or of electromagnetic spectra.

colors.wavelength( $\lambda$ , $norm$ )
The colors.wavelength( $\lambda$ , $norm$ ) function returns a color representation of monochromatic light at wavelength $\lambda$ , normalised to brightness $norm$ . A value of $norm=1$ is recommended for plotting the complete span of the electromagnetic spectrum without colors clipping to white.

colors.spectrum( $spec,norm$ )
The colors.spectrum( $spec,norm$ ) function returns a color representation of the spectrum $spec$ , normalised to brightness $norm$ . $spec$ should be a function object that takes a single input (wavelength) with units of length, and may return an output with arbitrary units.

For an example of the use of these functions, see Section 8.12.