什么是hue
The simple definition of hue is color or the characteristic that distinguishes one color from another. Hue is commonly a synonym for the words color, tone, shade, and tint. More specifically, in terms of physics, a hue is the dominant wavelength of light that a person can see - yellow, red, blue, green, etc.
hue直译为色调，表示一种颜色区别于另一种颜色的特征。色调通常是颜色、色调、阴影和色调的同义词。更具体地说，在物理学方面，色调是一个人所能看到的光的主要波长——黄、红、蓝、绿等。
hue和color的区别
Color is a term used to describe every variation of hue or neutral that we see. Hue refers more specifically to the colors of the visual spectrum — red, orange, yellow, green, blue, and violet --and these hues are blended to produce an untold number of colors.
颜色color用来描述我们所看到的色调或中性色的每一种变化。色调更具体地说是指视觉光谱的颜色——红色、橙色、黄色、绿色、蓝色和紫色——这些色调混合在一起，产生了数不清的颜色。
黑色是一种色调吗？白色是一种色调吗？灰色呢？
Since black, white, and gray are not part of the visual spectrum, they are not hues; however, both color and hue are words commonly used to define all of the colors we see. Don't allow the misuse of the term hue to confuse you. Black, white, and gray are not hues.
因为黑色、白色和灰色不是视觉光谱的一部分，所以它们不是色调；然而，颜色和色调都是用来定义我们看到的所有颜色的常用词。不要让色调这个词的误用迷惑你。黑色、白色和灰色不是色调。