In photography, you may want to add a sense of warmth to a photo by adding a cool color such as yellow. Adding a hot color like blue gives a sense of coolness to the photo.
Changing the mood can be done by tweaking the white balance setting. To add emotional warmth, choose a cooler light. Drop down a setting from daylight to fluorescent or tungsten. To create emotional coolness, choose a warmer light setting. Move up from daylight to cloudy.
