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hue: an angle between 0° and 360° which defines the color (0° is red, 120° is green, 240° is blue). In RGB terms, it represents both the ratio between the the highest and second to highest value of the three RGB channel and tells you which one is which.

hue: an angle between 0° and 360° which defines the color (0° is red, 120° is green, 240° is blue). In RGB terms, it tells you which channel (red, green or blue) is the one with the highest value, which one is the channel with the second highest value, and their ratio to each other.

hue: an angle between 0° and 360° which defines the color (0° is red, 120° is green, 240° is blue). In RGB terms, it represents the ratio between the three RGB channels.

saturation: the intensity of that color (a saturation of 0 is gray, hue doesn't matter in this case). In RGB terms, it says how much the highest color channel differs from the average.

volume: the brightness of the color (a volume of 0 is black, neither hue nor saturation matter in this case). It's equal to the RGB channel with the highest value.

hue: an angle between 0° and 360° which defines the color (0° is red, 120° is green, 240° is blue). In RGB terms, it represents both the ratio between the the highest and second to highest value of the three RGB channel and tells you which one is which.

saturation: the intensity of that color (a saturation of 0 is gray, hue doesn't matter in this case). In RGB terms, it represents the ratio between the highest channel and the lowest.

value: the brightness of the color (a value of 0 is black, neither hue nor saturation matter in this case). It's equal to the RGB channel with the highest value.

hue: an angle between 0° and 360° which defines the color (0° is red, 120° is green, 240° is blue)

saturation: the intensity of that color (a saturation of 0 is gray, hue doesn't matter in this case)

volume: the brightness of the color (a volume of 0 is black, neither hue nor saturation matter in this case)

hue: an angle between 0° and 360° which defines the color (0° is red, 120° is green, 240° is blue). In RGB terms, it represents the ratio between the three RGB channels.

saturation: the intensity of that color (a saturation of 0 is gray, hue doesn't matter in this case). In RGB terms, it says how much the highest color channel differs from the average.

volume: the brightness of the color (a volume of 0 is black, neither hue nor saturation matter in this case). It's equal to the RGB channel with the highest value.

In the widget above, the outer ring represents the hue, the x-coordinate of the rectangle represents the saturation (0 is left), and the y-coordinate the volume (0 is at the bottom).