I find it very interesting to observe how different lighting affects the way I perceive the colour of the painting. Taken in daylight the painting has a distinct 'blue' bias but with the addition of an artificial light it takes on a purple bias. The bulb used with the artificial light is advertised to give daylight, but it obviously does not compete with reality. I noted the colour of the paper in each photograph and, in the one with artificial light, the paper appears to have a 'yellow' tinge when in actual fact is is very white so, with that said, the one with the blue bias is more true to life.