From Presentation Zen: A fundamental design and life lesson from the Zen arts is to never use more when less will do. This goes for the use of color as well. The problem with most slide presentations is not that visuals contain too few colors, it’s that they contain too many. A common practice is to use several different vivid hues (colors) in presentation slides when even a single hue in various shades or tints would have been more effective. The ancient art of Japanese brush painting called Sumi-e (墨絵) provides a powerful lesson concerning the use of color, communication, and restraints.