Hue: This is what we usually mean when we ask "what color is that?" The property of color that we are actually asking about is "hue". For example, when we talk about colors that are red, yellow, green, and blue, we are talking about hue. Different hues are caused by different wavelengths of light. Therefore, this aspect of color is usually easy to recognize. Click for a more in-depth explanation of HUE.
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