Light and Colour (Goethe's Theory) – The Morning after the Deluge – Moses Writing the Book of Genesis feelings, while the colour blue contrasts such as it creates the emotion of melancholy and desolation. According to Goethe's concept, yellow undergoes a transition of light becoming darker when light reaches its peak, just as the Sun shines in the sky, it develops to a white light that is colourless. But the light deepens and evolves the yellow into an orange and then finally to a ruby red hue. Turner illustrates the process of yellow transitioning into phases of light by showing how, as the viewer moves away from the centre, the edges get darker. The yellowing colouring of the
Colour cast used to reduce the blueish tint caused by daylight. Blue filters reduce the orange colour caused by incandescent light. A variety of coloured filters in varying degrees of intensity are available. Kodak's amber filters, for example, vary from palest yellow ("81C") to deepest amber ("85B"). A photographer chooses which filter to use based on the quality of the ambient light. Colour temperature meters can read the temperature of the existing lighting conditions and guide the selection of the filter. Clouded sky, for example, requires a paler amber than clear blue sky. If a filter is unavailable, flash is an alternative