Qualitative Sequential Color Schemes

In qualitative/sequential schemes, the qualitative variable is represented with hues and the quantitative variable is represented with sequences of lightness steps within each hue. Binary/sequential schemes are a subset of qualitative/binary schemes with the binary variable represented by a hue difference and lightness differences reserved for the sequential variable. Population percentages (sequential) of varied dominant ethnic groups or religions (qualitative), for example, are well represented by a qualitative/sequential color scheme.

Qualitative Sequential Color Example

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