Colour coordinates
X=0.000, Y=0.000, Z=0.000
Displayed as RGB colour 000000
r=0.000, g=0.000, b=0.000
The input data format is
# Optional comment wavelength reflectance wavelength reflectance wavelength reflectance …
where wavelengths are in nanometres, reflectance is a number from the interval [0,1]. Numbers are in the standard scientific notation, with decimal point (not comma).