9 color

Quick answer：

The term '9 color' refers to a color system that uses nine colors as its base. It could be a variation of a color model or a naming system for a specific range of colors. In art and design, color models like RGB (Red, Green, Blue) and CMYK (Cyan, Magenta, Yellow, Key/Black) typically use a broader range of colors, which might include 9 distinct hues. In context, more information is needed to provide a precise explanation.