Hue is simply defined as [a colour or shade] in the Oxford Dictionary, but when we are dealing with the relationship between colours, we use the word Hue with a different meaning. Hue is instead, a property of colour. On its own it does not describe to us a colour's brightness, saturation, or chroma etc.
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In the image above, the left shows the original Hue for all of the colours. We could simply describe this image with saying: "a purple flower with green grass". To the right, we have the exact same image, with all other properties of colour the same except with a difference of Hue. We could describe this as: "an orange flower with blue grass."
If we were to change Hue for the whole image, rotating that property equally, every colour changes. But they do not become the same colour. The change from purple to orange, and green to blue, are one in the same when we're dealing with Hue changes on a computer.
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| Hue Spectrum |
If you were to place your finger on the colour green, then move it to the colour blue, the arbitrary value you would have travelled would be 120. Now if you image that, if you move your finger to the right end it would loop back to the left end, what would be the distance between purple and orange?
The simple definition you find in a dictionary doesn't help us truly understand the meaning of Hue, or at least differentiate it from other properties of colour. Hue may appear to you to simply be colour, but if it were the only property, we couldn't explore colours to the point of being able to recreate our vision into a captivating painting.
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