How to create a color planar diagram

Quick answer：

A color planar diagram is a visual representation used in colorimetry and color science to illustrate the relationships between different colors. To create one, you typically need to understand the color model you are working with, such as the RGB, CMYK, or HSV models. These diagrams often show the gamut of colors that can be produced by a particular device or process. You can create a color planar diagram by plotting the colors on a 3D graph based on the color model's coordinates, or by using specialized software designed for color analysis.