unity generate random color
//using Color
Color randomColor = new Color(
Random.Range(0f, 1f), //Red
Random.Range(0f, 1f), //Green
Random.Range(0f, 1f), //Blue
1, //Alpha (transparency)
);
//using Color32
Color32 randomColor = new Color32(
Random.Range(0, 255), //Red
Random.Range(0, 255), //Green
Random.Range(0, 255), //Blue
255, //Alpha (transparency)
);