Qualitative, sequential, diverging

There are three types of color scale, each designed to highlight different things in a visualization.

Type	Purpose
qualitative	Distinguish unordered categories
sequential	Show ordering
diverging	Show above or below a midpoint

Here you can see the results of a survey about math anxiety from a class of students. Each question has its own row, and responses range from "Strongly Disagree" to "Neutral" to "Strongly Agree".

Choose an appropriate color scale for the plot.

Data source: Bai et al. (2009)