Alpha component of the color.
var color : Color = Color.white; color.a = 0;
using UnityEngine; using System.Collections; public class Example : MonoBehaviour { public Color color = Color.white; void Example() { color.a = 0; } }
import UnityEngine import System.Collections public class Example(MonoBehaviour): public color as Color = Color.white def Example() as void: color.a = 0