Look at the legend for the first chart, which is a map of median household incomes.
Now, look at the legend for the second chart, which is the multiple bar chart we discussed before.
Six colors in one, 7 colors in the other.
Lowest bucket is under $40,000 in one, under $25,000 in the other. But both are given the same light yellow color.
By varying the color scale, the designer completely severs the relationship between the two charts. Worse, a non-existent correlation is invented via common colors that signify nothing!
If you haven't already, see my other post about this infographic.