Classed choropleth map

https://www.e-education.psu.edu/natureofgeoinfo/book/export/html/1553

A classed choropleth map shows information by shading of a color.  This is a classed map of the Hispanic Population density in the United States.The darker the shade the more dense the population is. As you can see states along the Mexico border have high populations of Hispanics and up north is less.