The hue of the short-wave end of the visible spectrum, evoked in the human observer by radiant energy with wavelengths of approximately380 to420 nanometers; any of a group of colors, reddish-blue in hue, that may vary in lightness and saturation.是什么意思_The hue of the short-wave end of the visible spectrum, evoked in the human observer by radiant energy with wavelengths of approximately380 to420 nanometers; any of a group of colors, reddish-blue in hue, that may vary in lightness and saturation.在线翻译_英语_读音_用法_例句