diff --git a/Classes/PHPExcel/Reader/Excel5.php b/Classes/PHPExcel/Reader/Excel5.php
index 8dd15af..969b8dc 100644
--- a/Classes/PHPExcel/Reader/Excel5.php
+++ b/Classes/PHPExcel/Reader/Excel5.php
@@ -7760,284 +7760,40 @@ class PHPExcel_Reader_Excel5 extends PHPExcel_Reader_Abstract implements PHPExce
      */
     private static function mapBuiltInColor($color)
     {
-        switch ($color) {
-            case 0x00:
-                return array('rgb' => '000000');
-            case 0x01:
-                return array('rgb' => 'FFFFFF');
-            case 0x02:
-                return array('rgb' => 'FF0000');
-            case 0x03:
-                return array('rgb' => '00FF00');
-            case 0x04:
-                return array('rgb' => '0000FF');
-            case 0x05:
-                return array('rgb' => 'FFFF00');
-            case 0x06:
-                return array('rgb' => 'FF00FF');
-            case 0x07:
-                return array('rgb' => '00FFFF');
-            case 0x40:
-                return array('rgb' => '000000'); // system window text color
-            case 0x41:
-                return array('rgb' => 'FFFFFF'); // system window background color
-            default:
-                return array('rgb' => '000000');
+        if (isset(PHPExcel_Reader_Excel5_Color_BuiltIn::$map[$color])) {
+            return array('rgb' => PHPExcel_Reader_Excel5_Color_BuiltIn::$map[$color]);
         }
+        return array('rgb' => '000000');
     }
 
 
     /**
      * Map color array from BIFF5 built-in color index
      *
-     * @param int $subData
+     * @param int $color
      * @return array
      */
-    private static function mapColorBIFF5($subData)
+    private static function mapColorBIFF5($color)
     {
-        switch ($subData) {
-            case 0x08:
-                return array('rgb' => '000000');
-            case 0x09:
-                return array('rgb' => 'FFFFFF');
-            case 0x0A:
-                return array('rgb' => 'FF0000');
-            case 0x0B:
-                return array('rgb' => '00FF00');
-            case 0x0C:
-                return array('rgb' => '0000FF');
-            case 0x0D:
-                return array('rgb' => 'FFFF00');
-            case 0x0E:
-                return array('rgb' => 'FF00FF');
-            case 0x0F:
-                return array('rgb' => '00FFFF');
-            case 0x10:
-                return array('rgb' => '800000');
-            case 0x11:
-                return array('rgb' => '008000');
-            case 0x12:
-                return array('rgb' => '000080');
-            case 0x13:
-                return array('rgb' => '808000');
-            case 0x14:
-                return array('rgb' => '800080');
-            case 0x15:
-                return array('rgb' => '008080');
-            case 0x16:
-                return array('rgb' => 'C0C0C0');
-            case 0x17:
-                return array('rgb' => '808080');
-            case 0x18:
-                return array('rgb' => '8080FF');
-            case 0x19:
-                return array('rgb' => '802060');
-            case 0x1A:
-                return array('rgb' => 'FFFFC0');
-            case 0x1B:
-                return array('rgb' => 'A0E0F0');
-            case 0x1C:
-                return array('rgb' => '600080');
-            case 0x1D:
-                return array('rgb' => 'FF8080');
-            case 0x1E:
-                return array('rgb' => '0080C0');
-            case 0x1F:
-                return array('rgb' => 'C0C0FF');
-            case 0x20:
-                return array('rgb' => '000080');
-            case 0x21:
-                return array('rgb' => 'FF00FF');
-            case 0x22:
-                return array('rgb' => 'FFFF00');
-            case 0x23:
-                return array('rgb' => '00FFFF');
-            case 0x24:
-                return array('rgb' => '800080');
-            case 0x25:
-                return array('rgb' => '800000');
-            case 0x26:
-                return array('rgb' => '008080');
-            case 0x27:
-                return array('rgb' => '0000FF');
-            case 0x28:
-                return array('rgb' => '00CFFF');
-            case 0x29:
-                return array('rgb' => '69FFFF');
-            case 0x2A:
-                return array('rgb' => 'E0FFE0');
-            case 0x2B:
-                return array('rgb' => 'FFFF80');
-            case 0x2C:
-                return array('rgb' => 'A6CAF0');
-            case 0x2D:
-                return array('rgb' => 'DD9CB3');
-            case 0x2E:
-                return array('rgb' => 'B38FEE');
-            case 0x2F:
-                return array('rgb' => 'E3E3E3');
-            case 0x30:
-                return array('rgb' => '2A6FF9');
-            case 0x31:
-                return array('rgb' => '3FB8CD');
-            case 0x32:
-                return array('rgb' => '488436');
-            case 0x33:
-                return array('rgb' => '958C41');
-            case 0x34:
-                return array('rgb' => '8E5E42');
-            case 0x35:
-                return array('rgb' => 'A0627A');
-            case 0x36:
-                return array('rgb' => '624FAC');
-            case 0x37:
-                return array('rgb' => '969696');
-            case 0x38:
-                return array('rgb' => '1D2FBE');
-            case 0x39:
-                return array('rgb' => '286676');
-            case 0x3A:
-                return array('rgb' => '004500');
-            case 0x3B:
-                return array('rgb' => '453E01');
-            case 0x3C:
-                return array('rgb' => '6A2813');
-            case 0x3D:
-                return array('rgb' => '85396A');
-            case 0x3E:
-                return array('rgb' => '4A3285');
-            case 0x3F:
-                return array('rgb' => '424242');
-            default:
-                return array('rgb' => '000000');
+        if (isset(PHPExcel_Reader_Excel5_Color_BIFF5::$map[$color])) {
+            return array('rgb' => PHPExcel_Reader_Excel5_Color_BIFF5::$map[$color]);
         }
+        return array('rgb' => '000000');
     }
 
 
     /**
      * Map color array from BIFF8 built-in color index
      *
-     * @param int $subData
+     * @param int $color
      * @return array
      */
-    private static function mapColor($subData)
+    private static function mapColor($color)
     {
-        switch ($subData) {
-            case 0x08:
-                return array('rgb' => '000000');
-            case 0x09:
-                return array('rgb' => 'FFFFFF');
-            case 0x0A:
-                return array('rgb' => 'FF0000');
-            case 0x0B:
-                return array('rgb' => '00FF00');
-            case 0x0C:
-                return array('rgb' => '0000FF');
-            case 0x0D:
-                return array('rgb' => 'FFFF00');
-            case 0x0E:
-                return array('rgb' => 'FF00FF');
-            case 0x0F:
-                return array('rgb' => '00FFFF');
-            case 0x10:
-                return array('rgb' => '800000');
-            case 0x11:
-                return array('rgb' => '008000');
-            case 0x12:
-                return array('rgb' => '000080');
-            case 0x13:
-                return array('rgb' => '808000');
-            case 0x14:
-                return array('rgb' => '800080');
-            case 0x15:
-                return array('rgb' => '008080');
-            case 0x16:
-                return array('rgb' => 'C0C0C0');
-            case 0x17:
-                return array('rgb' => '808080');
-            case 0x18:
-                return array('rgb' => '9999FF');
-            case 0x19:
-                return array('rgb' => '993366');
-            case 0x1A:
-                return array('rgb' => 'FFFFCC');
-            case 0x1B:
-                return array('rgb' => 'CCFFFF');
-            case 0x1C:
-                return array('rgb' => '660066');
-            case 0x1D:
-                return array('rgb' => 'FF8080');
-            case 0x1E:
-                return array('rgb' => '0066CC');
-            case 0x1F:
-                return array('rgb' => 'CCCCFF');
-            case 0x20:
-                return array('rgb' => '000080');
-            case 0x21:
-                return array('rgb' => 'FF00FF');
-            case 0x22:
-                return array('rgb' => 'FFFF00');
-            case 0x23:
-                return array('rgb' => '00FFFF');
-            case 0x24:
-                return array('rgb' => '800080');
-            case 0x25:
-                return array('rgb' => '800000');
-            case 0x26:
-                return array('rgb' => '008080');
-            case 0x27:
-                return array('rgb' => '0000FF');
-            case 0x28:
-                return array('rgb' => '00CCFF');
-            case 0x29:
-                return array('rgb' => 'CCFFFF');
-            case 0x2A:
-                return array('rgb' => 'CCFFCC');
-            case 0x2B:
-                return array('rgb' => 'FFFF99');
-            case 0x2C:
-                return array('rgb' => '99CCFF');
-            case 0x2D:
-                return array('rgb' => 'FF99CC');
-            case 0x2E:
-                return array('rgb' => 'CC99FF');
-            case 0x2F:
-                return array('rgb' => 'FFCC99');
-            case 0x30:
-                return array('rgb' => '3366FF');
-            case 0x31:
-                return array('rgb' => '33CCCC');
-            case 0x32:
-                return array('rgb' => '99CC00');
-            case 0x33:
-                return array('rgb' => 'FFCC00');
-            case 0x34:
-                return array('rgb' => 'FF9900');
-            case 0x35:
-                return array('rgb' => 'FF6600');
-            case 0x36:
-                return array('rgb' => '666699');
-            case 0x37:
-                return array('rgb' => '969696');
-            case 0x38:
-                return array('rgb' => '003366');
-            case 0x39:
-                return array('rgb' => '339966');
-            case 0x3A:
-                return array('rgb' => '003300');
-            case 0x3B:
-                return array('rgb' => '333300');
-            case 0x3C:
-                return array('rgb' => '993300');
-            case 0x3D:
-                return array('rgb' => '993366');
-            case 0x3E:
-                return array('rgb' => '333399');
-            case 0x3F:
-                return array('rgb' => '333333');
-            default:
-                return array('rgb' => '000000');
+        if (isset(PHPExcel_Reader_Excel5_Color_BIFF8::$map[$color])) {
+            return array('rgb' => PHPExcel_Reader_Excel5_Color_BIFF8::$map[$color]);
         }
+        return array('rgb' => '000000');
     }
 
     private function parseRichText($is = '')
diff --git a/Classes/PHPExcel/Reader/Excel5/Color/BIFF5.php b/Classes/PHPExcel/Reader/Excel5/Color/BIFF5.php
new file mode 100644
index 0000000..7c15d5d
--- /dev/null
+++ b/Classes/PHPExcel/Reader/Excel5/Color/BIFF5.php
@@ -0,0 +1,63 @@
+<?php
+
+class PHPExcel_Reader_Excel5_Color_BIFF5
+{
+    public static $map = array(
+        0x08 => '000000',
+        0x09 => 'FFFFFF',
+        0x0A => 'FF0000',
+        0x0B => '00FF00',
+        0x0C => '0000FF',
+        0x0D => 'FFFF00',
+        0x0E => 'FF00FF',
+        0x0F => '00FFFF',
+        0x10 => '800000',
+        0x11 => '008000',
+        0x12 => '000080',
+        0x13 => '808000',
+        0x14 => '800080',
+        0x15 => '008080',
+        0x16 => 'C0C0C0',
+        0x17 => '808080',
+        0x18 => '8080FF',
+        0x19 => '802060',
+        0x1A => 'FFFFC0',
+        0x1B => 'A0E0F0',
+        0x1C => '600080',
+        0x1D => 'FF8080',
+        0x1E => '0080C0',
+        0x1F => 'C0C0FF',
+        0x20 => '000080',
+        0x21 => 'FF00FF',
+        0x22 => 'FFFF00',
+        0x23 => '00FFFF',
+        0x24 => '800080',
+        0x25 => '800000',
+        0x26 => '008080',
+        0x27 => '0000FF',
+        0x28 => '00CFFF',
+        0x29 => '69FFFF',
+        0x2A => 'E0FFE0',
+        0x2B => 'FFFF80',
+        0x2C => 'A6CAF0',
+        0x2D => 'DD9CB3',
+        0x2E => 'B38FEE',
+        0x2F => 'E3E3E3',
+        0x30 => '2A6FF9',
+        0x31 => '3FB8CD',
+        0x32 => '488436',
+        0x33 => '958C41',
+        0x34 => '8E5E42',
+        0x35 => 'A0627A',
+        0x36 => '624FAC',
+        0x37 => '969696',
+        0x38 => '1D2FBE',
+        0x39 => '286676',
+        0x3A => '004500',
+        0x3B => '453E01',
+        0x3C => '6A2813',
+        0x3D => '85396A',
+        0x3E => '4A3285',
+        0x3F => '424242',
+    );
+}
\ No newline at end of file
diff --git a/Classes/PHPExcel/Reader/Excel5/Color/BIFF8.php b/Classes/PHPExcel/Reader/Excel5/Color/BIFF8.php
new file mode 100644
index 0000000..d0c8afb
--- /dev/null
+++ b/Classes/PHPExcel/Reader/Excel5/Color/BIFF8.php
@@ -0,0 +1,63 @@
+<?php
+
+class PHPExcel_Reader_Excel5_Color_BIFF8
+{
+    public static $map = array(
+        0x08 => '000000',
+        0x09 => 'FFFFFF',
+        0x0A => 'FF0000',
+        0x0B => '00FF00',
+        0x0C => '0000FF',
+        0x0D => 'FFFF00',
+        0x0E => 'FF00FF',
+        0x0F => '00FFFF',
+        0x10 => '800000',
+        0x11 => '008000',
+        0x12 => '000080',
+        0x13 => '808000',
+        0x14 => '800080',
+        0x15 => '008080',
+        0x16 => 'C0C0C0',
+        0x17 => '808080',
+        0x18 => '9999FF',
+        0x19 => '993366',
+        0x1A => 'FFFFCC',
+        0x1B => 'CCFFFF',
+        0x1C => '660066',
+        0x1D => 'FF8080',
+        0x1E => '0066CC',
+        0x1F => 'CCCCFF',
+        0x20 => '000080',
+        0x21 => 'FF00FF',
+        0x22 => 'FFFF00',
+        0x23 => '00FFFF',
+        0x24 => '800080',
+        0x25 => '800000',
+        0x26 => '008080',
+        0x27 => '0000FF',
+        0x28 => '00CCFF',
+        0x29 => 'CCFFFF',
+        0x2A => 'CCFFCC',
+        0x2B => 'FFFF99',
+        0x2C => '99CCFF',
+        0x2D => 'FF99CC',
+        0x2E => 'CC99FF',
+        0x2F => 'FFCC99',
+        0x30 => '3366FF',
+        0x31 => '33CCCC',
+        0x32 => '99CC00',
+        0x33 => 'FFCC00',
+        0x34 => 'FF9900',
+        0x35 => 'FF6600',
+        0x36 => '666699',
+        0x37 => '969696',
+        0x38 => '003366',
+        0x39 => '339966',
+        0x3A => '003300',
+        0x3B => '333300',
+        0x3C => '993300',
+        0x3D => '993366',
+        0x3E => '333399',
+        0x3F => '333333',
+    );
+}
\ No newline at end of file
diff --git a/Classes/PHPExcel/Reader/Excel5/Color/BuiltIn.php b/Classes/PHPExcel/Reader/Excel5/Color/BuiltIn.php
new file mode 100644
index 0000000..f345895
--- /dev/null
+++ b/Classes/PHPExcel/Reader/Excel5/Color/BuiltIn.php
@@ -0,0 +1,17 @@
+<?php
+
+class PHPExcel_Reader_Excel5_Color_BuiltIn
+{
+    public static $map = array(
+        0x00 => '000000',
+        0x01 => 'FFFFFF',
+        0x02 => 'FF0000',
+        0x03 => '00FF00',
+        0x04 => '0000FF',
+        0x05 => 'FFFF00',
+        0x06 => 'FF00FF',
+        0x07 => '00FFFF',
+        0x40 => '000000', // system window text color
+        0x41 => 'FFFFFF', // system window background color
+    );
+}
\ No newline at end of file