A note on symbolizing features

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Hue

Hue is one of the main properties of a color, it is the perceptual dimension associated with color names, e.g., red, gree, or blue. Typically, we use different hues to represent different categories of data such as when representing neighborhoods:

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Lightness

Also known as Brightness, is a representation of variation in the perception of a color or color space’s brightness. Lightness is an important dimension for representing ordinal/interval/ratio data. For our income map, we use three different hues (i.e., green, yellow, and orange) with decreasing lightness values for them.

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Saturation

Saturation is the intensity of a hue from gray tone (no saturation) to pure, vivid color (high saturation). Gimond advises care when manipulating saturation. It should be modified sparingly in most maps.

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