public enum LabelIcon

{

    Gray = ,

    Blue,

    Teal,

    Green,

    Yellow,

    Orange,

    Red,

    Purple

}

public enum Icon

{

    CircleGray = ,

    CircleBlue,

    CircleTeal,

    CircleGreen,

    CircleYellow,

    CircleOrange,

    CircleRed,

    CirclePurple,

    DiamondGray,

    DiamondBlue,

    DiamondTeal,

    DiamondGreen,

    DiamondYellow,

    DiamondOrange,

    DiamondRed,

    DiamondPurple

}

private static GUIContent[] labelIcons;

private static GUIContent[] largeIcons;

public static void SetIcon(GameObject gObj, LabelIcon icon)

{

    if (labelIcons == null)

    {

        labelIcons = GetTextures("sv_label_", string.Empty, , );

    }

    SetIcon(gObj, labelIcons[(int)icon].image as Texture2D);

}

public static void SetIcon(GameObject gObj, Icon icon)

{

    if (largeIcons == null)

    {

        largeIcons = GetTextures("sv_icon_dot", "_pix16_gizmo", , );

    }

    SetIcon(gObj, largeIcons[(int)icon].image as Texture2D);

}

private static void SetIcon(GameObject gObj, Texture2D texture)

{

    var ty = typeof(EditorGUIUtility);

    var mi = ty.GetMethod("SetIconForObject", BindingFlags.NonPublic | BindingFlags.Static);

    mi.Invoke(null, new object[] { gObj, texture });

}

private static GUIContent[] GetTextures(string baseName, string postFix, int startIndex, int count)

{

    GUIContent[] guiContentArray = new GUIContent[count];

    var t = typeof(EditorGUIUtility);

    var mi = t.GetMethod("IconContent", BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(string) }, null);

    for (int index = ; index < count; ++index)

    {

        guiContentArray[index] = mi.Invoke(null, new object[] { baseName + (object)(startIndex + index) + postFix }) as GUIContent;

    }

    return guiContentArray;

}

     void Test()

     {

         GameObject go = new GameObject("");

         Util.SetIcon(go, LabelIcon.Red);

     }

     void OnGUI()

     {

         if (GUI.Button(new Rect(, , , ), "I am a button")) Test();

     }