Version: 2017.4
public Color selectionColor ;

説明

テキストフィールド内の選択範囲の色を設定します

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public string str = "This is a string with \n two lines of text"; void OnGUI() { GUI.skin.settings.selectionColor = Color.cyan; str = GUILayout.TextArea(str); } }