How do I change color of sprite in a lerp?

I want from green to red. Sory if the my english not clear.

In unity very easy: Color.Lerp(Color.Green,Color.Red,1-health*0.01);

You can do it with an effect. Maybe set color? and just set the red, green and blue parameters from events.

Please paste code here because i dont understand.

When you add an effect you can use an action in the event sheet to do it. My machine doesn't like webgl so I won't make an example.