How to make series override dependent on template variable?

I have a use case where I have a variable and there are 2 measurements for each variable. I want each variable option in a graph panel to be the same color.

For example, assume I have a variable that gives locations (‘Houston’, ‘Seattle’, ‘Miami’, etc.) and I am plotting temperature and humidity in a graph. How do I make a series override so that each city has the same color? So Temp and Humidity for Houston would be orange, and green for seattle temp and humidity, etc.?