Cold and warm color images refer to photographs or visual works that utilize the psychological effects of colors to evoke specific moods. Cold colors, such as blues and greens, tend to convey calmness, tranquility, and coolness. Warm colors, like reds and oranges, often evoke warmth, energy, and passion. This concept is rooted in color theory, which is a field of study in art and design that deals with the visual effects of colors.