How to access Text value

Hello to everybody,

I'm in stuck trying to color my custom leaderboard with different color based on car class. 

I know how to change the color with a formula but I don't know how to access to the value with the car class name. 
I already added OpponentCarClass component to screen and it shows fine, but in the formula I really don't know how to access it. 

I tried to add in the formula the name of the field (in my case I renamed it CarClass) to get the value but it doesn't work. 

Any help will be so appreciated!

thanks