[martco]

You're right that they're not consistent between the two charts. That can be misleading.

They are ordered by percentage descending, so you can quickly understand which is the 2nd most populous, 3rd most populous, etc. The ethnicity name is right by the percentage so you can quickly grok it, even though the colors don't match across pie charts.

[benrudolph]

You can still sort the pie charts by percentage and keep the same colors. This would aid in understanding the differences between the US and Amazon workforces which I believe is the point of using the two pie charts.