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Color.a

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public float a;

Description

Alpha component of the color (0 is transparent, 1 is opaque).

using UnityEngine;

public class Example : MonoBehaviour
{
    public Color color = Color.white;

    void Start()
    {
        color.a = 0.42f;
    }
}

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Copyright © 2019 Unity Technologies. Publication: 2019.1-002V. Built: 2019-04-15.
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