Being of the achromatic color of maximum darkness; having little or no hue owing to absorption of almost all incident light.
最黑的非彩色颜色；因为吸收了几乎所有的入射光而只有很少的颜色或者没有颜色。
2
In this paper we have discussed the relation between the whiteness of the light source and lightness, achromatic stimulus sensation and colour temperature etc.