So I discovered a workaround to this problem.
Set your primary color.
Click the advanced color settings and locate your primary (labeled as Primary - 500).
Hover over the shade above it (Primary - 400), and make note of the hex code.
Now change your primary color to this new color and it should match better:
![SueStewart_0-1704821669872.png SueStewart_0-1704821669872.png](https://community.esri.com/t5/image/serverpage/image-id/90983i7C2CAD095AFADCE2/image-size/medium?v=v2&px=400)