名詞 chroma:

1. chromatic purity: freedom from dilution with white and hence vivid in hue
   同義詞：saturation, intensity, vividness

chro.ma

n.（名詞）
The aspect of color in the Munsell color system by which a sample appears to differ from a gray of the same lightness or brightness and that corresponds to saturation of the perceived color.
色品，色度：曼塞爾色系中的色圖，例如相同明度和亮度的灰色會由于可見色的飽和度不同而不一樣

來源：
Greek khrôma [color]
希臘語 khrôma [顏色]