Nine Tone Combination Chart

Quick answer：

A 'Nine Tone Combination Chart' typically refers to a visual representation that uses a set of nine different hues or shades. This could be used in various contexts such as art, design, color theory, or cultural aesthetics to illustrate the diversity and harmony of colors. In art and design, such charts are often used to understand color relationships and create balanced compositions. In color theory, they can help to study the properties of different hues and their interactions.