Movie 12 (:39)

Script : Without colour correction, the world ahead turns blue, and the sun darkens as visible light shifts into ultraviolet and above. This is matched by a reddening behind. A rainbow ring appears in the sky as the blue colour is shifted through the regions of the spectrum our eyes detect as red and green.

We only see light in a narrow range, ROY G BIV, and high speeds can easily shift visible light above or below visible range.
Doppler shift effects are seen again in this mercator projection.Though the distribution of energy in spectra means that the Doppler effect will sometimes make an object look darker, this is not the only effect changing the brightness of the tram.