In this chapter, we looked at how color is created and perceived, and how to harness it to improve our maps, not just make them colorful. We also took a few basic techniques and upgraded them using Pro's improved transparency handling. At the end of the day, however, it's not about whether or not you chose attractive colors, but whether or not it enhanced the readability of your map. Any time you apply color, it should be helping your message, not hindering it.
In the next chapter, we'll look at further improving map communication through cartographic abstraction. We'll examine the relationship between scale, accuracy, and legibility, and learn ways to aggregate spatial data for maximum impact. For further information, you may refer to Robert E. Roth, Andrew W. Woodruff, Zachary F. Johnson, Value-by-alpha maps: An alternative technique to the cartogram, The Cartographic Journal, Vol. 47, No. 2, May 2010 (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3173776/?).