Qualitative Binary Color Schemes

In qualitative/binary schemes, light and dark versions of each hue of the qualitative variable correspond to the binary variable categories. Binary/binary schemes are a subset of the qualitative/binary schemes with one binary difference represented by a hue difference and the other by a lightness difference. A multi-hued vegetation map (qualitative) with darker hues for vegetation on public lands and lighter hues for vegetation on private lands (binary) is well suited by a qualitative/binary color scheme.

Qualitative Binary Color Example

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Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University