Color32.this[int]

public byte this[int] ;

Description

Access the red (r), green (g), blue (b), and alpha (a) color components using [0], [1], [2], [3] respectively.

using UnityEngine;

public class Example : MonoBehaviour
{
    Color32 color = new Color32(0, 0, 0, 0);
    void Start()
    {
        //The same as color.g = 255
        color[1] = 255;
    }
}