a-visualization.html#fig:badColors">4.10</a>) where there is only color contrast between the elements but no brightness contrast. It is always helpful to use graph elements that differ substantially in brightness and/or texture, in addition to color. There are also <a href="http://www.cookbook-r.com/Graphs/Colors_(ggplot2)/#a-colorblind-friendly-palette">“colorblind-friendly” palettes</a> available for use with many visualization tools.</p>
<div class="figure"><span style="display:block;" id="fig:badCol