Scripting Reference
Color.operator *

static operator * (a : Color, b : Color) : Color

Description

Multiplies two colors together. Each component is multiplied separately.

JavaScript 
    // white * gray = gray
    var grayColor: Color = Color.gray * Color.white;
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Color grayColor = Color.gray * Color.white;
}
import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public grayColor as Color = (Color.gray * Color.white)

static operator * (a : Color, b : float) : Color

Description

Multiplies color a by the float b. Each color component is scaled separately.

JavaScript 
    // gray * 2 = White
    var whiteColor: Color = Color.gray * 2;
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Color whiteColor = Color.gray * 2;
}
import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public whiteColor as Color = (Color.gray * 2)

static operator * (b : float, a : Color) : Color

Description

Multiplies color a by the float b. Each color component is scaled separately.

JavaScript 
    // 2 * gray = White
    var whiteColor: Color = 2 * Color.gray;
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Color whiteColor = 2 * Color.gray;
}
import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public whiteColor as Color = (2 * Color.gray)