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