Not all cats are grey in the dark!

Not all cats are grey in the dark!

Our eyes are sensitive to only three spectral color bands (red, green, blue), and we can no longer distinguish colors if it becomes very dark. Spectroscopists can identify many more colors by the frequencies of the light waves, so that they can distinguish atoms and molecules by their spectral fingerprints. Scientists have now recorded broad spectra with close to one hundred thousand colors in almost complete darkness.