ABSTRACT
Light has different colors because of differences in what's called wavelength. The light conscious photographer is acutely aware of blue sky. While the blue skies can surely be pretty, the blue light falling on the earth can be a photographer's headache. The blue light compromises the warm colors. Even otherwise neutral colors will take on a blue colorcast. Photographers shooting RAW files have a decided edge here. JPEG files come out of the camera ready to go, but they only allow minor color correction in post-capture editing. RAW files allow far more color optimization. If a subject has a colorcast to it because of the color of the prevailing light, the Automatic white balance (AWB) selection will attempt to remove that colorcast and render the image as if it were shot under white light. Sometimes the Automatic white balance system can’t cope with a complex mix of light colors.
