Oil Pressure Light Senders

Does the sender for the light in the cluster need a specific resistance or is it just a switch?

And if it is a switch... how would I change it to use a multi color led to indicate say:
Red: 0-5 psi
Yellow: 5-20 psi
Green: 20+ psi
This would show that there is indeed pressure and not a lack of power to the sender and light.

 

I have no idea how to get the LED's to change color but likely you would need an electric sender for a gauge instead of a light. A gauge sender would change resistance according to pressure.

 

The stock oil pressure switch is just a switch. It grounds the terminal with no pressure and breaks the connection with pressure.

 

Internet search found this. I'd guess it would take a OP transducer and not just a switch, but I'm a mechanical guy!

https://www.circuitbread.com/tutorials/how-rgb-leds-work-and-how-to-control-color