First, let me see if my facts are straight. White coloured objects reflect more light of ALL frequencies than black coloured objects, including infrared, etc. Hence a white coloured object is cooler than a black coloured object. If visible light was the only factor, a blue room would be cooler than a red room as blue light has more energy. I"m assuming same wall area and intensity of light. I wanted to know about the trends of these colours in infrared absorption. Does blue absorb less infrared than red? In a more realistic situation where the sun"s rays are incident on a wall, will a blue coloured wall be still be cooler now that other frequencies of light are also incident? Thanks.