Color.gray

static var gray : Color

Description

Gray. RGBA is (0.5, 0.5, 0.5, 1).

JavaScript
    // Assign a gray color to this transform's material
transform.renderer.material.color = Color.gray;

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
void Example() {
transform.renderer.material.color = Color.gray;
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

def Example():
transform.renderer.material.color = Color.gray