Access the r, g, b,a components using [0], [1], [2], [3] respectively.
var p : Color; p[1] = 5; // the same as p.g = 5
using UnityEngine; using System.Collections; public class Example : MonoBehaviour { public Color p; void Example() { p[1] = 5; } }
import UnityEngine import System.Collections public class Example(MonoBehaviour): public p as Color def Example() as void: p[1] = 5