The term 'color composition of high-color images' refers to the arrangement and use of a wide range of colors in an image. High-color images typically have a high color depth, which allows for a greater variety of colors and smoother gradients. This can be achieved through various color models, such as RGB (Red, Green, Blue) or CMYK (Cyan, Magenta, Yellow, Key/Black). The composition of colors in high-color images can be used to convey emotions, enhance visual appeal, and communicate the subject matter effectively.