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Hue value incremented/decremented by a small value


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It happens because colors are stored as Red, Green, Blue, not HSV. When you enter an HSV value it's converted to RGB, then the HSV value for the RGB is displayed. For example, suppose you have a color with a very low value, so there are only 3 bits of non-black color. There aren't 360 hues that can be formed from those bit combinations, so some hue values won't be available.

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^ Good idea.

 

There is no 1:1 mapping of RGB to HSV and HSV to RGB. What you're seeing are differences in rounding. Relying on the RGB values and ignoring the HSV is the way to go.

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