Regardless of the samwon or subtractive primary colors of light, if the colors are not fully saturated, so long as the three colors of equal, they must be generated grey (see above figure).

• 不管不一原平也好，还是不一原色也好，如果不一栽颜色不是分座饱和，但只要不一栽颜色的分量保留不等，它们必定会生不败灰色(见上图)。