In the case of choropleth maps, the intensity of color, either through saturation
percentage or through the hue, denotes intensity of a variable. One of the things you
can do to make your choice of colors easier is to think about the variable you are trying
to map and whether there might be a literal or metaphorical color to complement
it. For example, is your variable household wealth? Maybe you would want to use
a light green to dark green color ramp since green is often associated with money.
A simple example of a choropleth map that uses multiple colors is a map of college
swimming programs. Areas with the most college swimming programs might be
shown in a dark blue color, areas with fewer college swimming programs could be in
a lighter blue color, and then perhaps areas with no college swimming programs at
all would be shown in white or black.
In the case of choropleth maps, the intensity of color, either through saturation
percentage or through the hue, denotes intensity of a variable. One of the things you
can do to make your choice of colors easier is to think about the variable you are trying
to map and whether there might be a literal or metaphorical color to complement
it. For example, is your variable household wealth? Maybe you would want to use
a light green to dark green color ramp since green is often associated with money.
A simple example of a choropleth map that uses multiple colors is a map of college
swimming programs. Areas with the most college swimming programs might be
shown in a dark blue color, areas with fewer college swimming programs could be in
a lighter blue color, and then perhaps areas with no college swimming programs at
all would be shown in white or black.
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