/// <summary> /// 获取无效时文本颜色 /// </summary> /// <param name="backColor">控件背景色</param> /// <returns>无效颜色</returns> public static Color GetGrayColor(Color backColor) { Color controlDark = SystemColors.ControlDark; if (RenderEngine.IsDarker(backColor, SystemColors.Control)) { controlDark = ControlPaint.Dark(backColor); } return(controlDark); }