How do I set the color of a light with a script?

Actually it seems more that I know how to do this, but Unity does not.

var light1 : GameObject;

light1.light.color = (1,0,0); //this gives an "expecting ),found ','."

or like this:

light1.light.color = red; //this gives an "unknown identifier: "red"."

And I'm setting the intensity of this same light (dragged to the light1 slot in the inspector) in the previous line, the same way, with no error. What gives?