明めい度ど

noun

brightness; lightness

Technical term used in color science, design, and physics to describe the perceived luminance or lightness of a color or surface.

• 色いろの三さん属ぞく性せいは、色しき相そう、彩さい度ど、明めい度どです。

  The three attributes of color are hue, saturation, and brightness.

• この色いろは明めい度どが高たかいので、背はい景けいにすると文字、もじが読よみにくい。

  This color has high lightness, so text is hard to read when used as a background.