Blue is not the warmest colour…

…even though a 2013 film title would have you think otherwise.

We perceive colours towards the red end of the spectrum as being warmer than those at the blue end of the spectrum.  This is a bit of a paradox as the redder the light the cooler the actual temperature.   Objects at very high temperature radiate light at the blue end of the spectrum.  It’s the infrared that makes us feel warm, and perhaps we perceive the blue colours as relating to the cold of such things as snow and ice.  However it works, we associate red tones with warmth.

There are lots of warm tones in this image.  The low angle of the autumn light has given a long shadow, with the red of the cranberry juice adding to the browns of the table’s wood.  The only cooler colour is the ceramic coaster under the glass, and even that is not very cool.

There is some cooler blue in the sky here of course, but the majority of the image has the warm tones of a sunset.  The sun’s low angle has given great backlighting to the seed heads of the Old Man’s Beard (a wild clematis) in the hedgerow.  The camera has coped surprisingly well with the challenges of shooting into the sun.

In this last image I have moved away from the reddest colours, but it’s still a warm-toned image.  There’s a patch of blue towards the centre that gives a bit of colour contrast.  It’s an example of camera movement during exposure.  I used the “Silky Water” mode on my camera and pressed the shutter button whilst I was walking along an alley in Bristol on a rainy night.

All images were taken on a Huawei Mate 10 Pro mobile phone.  I call it my camera that also makes phone calls.

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