Sequential Sequential Color Schemes

Sequential/sequential schemes are the logical mix of all combinations of the colors in two sequential schemes. Thus, the schemes are based on two hues. The hue mixtures may form a third hue (magenta and cyan sequences produce a variety of transitional purple-blues). If the two hues crossed are approximate complements, their mixtures produce a neutral gray diagonal and desaturated transitional colors. Systematic lightness differences throughout the scheme are important; do not depend on hue to impart the magnitude message. Use hue transitions to designate differences in proportions of the two variables mapped. For example, data on educational attainment crossed with crime rate categories are well represented by a sequential/sequential color scheme.

Sequential Sequential Color Examples

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