A new image from The King of Color highlights the man who would standardize color with the Pantone Matching System.

My daughter started fifth grade this month with a wonderful new teacher and, to my delight, the absence of one of the most annoyingly ubiquitous “tools” in modern classrooms today: the behavior chart.

This chart is a guide for understanding the overall tone conveyed by the color combinations within our communications. Colors range from formal to casual and from muted to vibrant. On each sample ...