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