To color, tint, or impart color to something; to treat or stain with color.
From chroma (color) + -ize (suffix meaning to make or cause to be). A verb created in scientific and artistic contexts to describe the process of adding or developing color.
In early photography and printing, chromatize meant manually adding colors by hand—artists would chromatize black-and-white images one at a time before color printing technology existed.
Complete word intelligence in one call. Free tier — 50 lookups/day.