diff --git a/head.php b/head.php
index 3dbbb74d0..3a2cb37b0 100644
--- a/head.php
+++ b/head.php
@@ -108,6 +108,23 @@ include_once(G4_LIB_PATH.'/popular.lib.php');
                 </a>
             </li>
             <? } ?>
+            <? // 색상대비 on/off
+            $cr_path = g4_path();
+            if($contrast_use == 'on') {
+                $cr_uri = $cr_path['curr_url'].'?contrast=off';
+            } else {
+                $cr_uri = $cr_path['curr_url'].'?contrast=on';
+            }
+            if($_SERVER['QUERY_STRING']) {
+                $query_string = preg_replace("/contrast=(on|off)&?/", "", $_SERVER['QUERY_STRING']);
+                if($query_string)
+                    $cr_uri .= '&amp;'.$query_string;
+            }
+            unset($cr_path);
+            ?>
+            <li>
+                <a href="<?=$cr_uri;?>">색상대비</a>
+            </li>
         </ul>
 
     </div>
diff --git a/head.sub.php b/head.sub.php
index 0af5df384..9e941949a 100644
--- a/head.sub.php
+++ b/head.sub.php
@@ -28,6 +28,14 @@ header("Expires: 0"); // rfc2616 - Section 14.21
 header("Pragma: no-cache"); // HTTP/1.0
 */
 
+// 색상대비
+if($_GET['contrast'] == 'on') {
+    set_session('ss_contrast_use', 'on');
+} else if($_GET['contrast'] == 'off') {
+    set_session('ss_contrast_use', 'off');
+}
+$contrast_use = get_session('ss_contrast_use');
+
 $g4_css = "";
 if (G4_IS_MOBILE) $g4_css = "mobile";
 else $g4_css = "default";
@@ -40,9 +48,15 @@ else $g4_css = "default";
 <!-- <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> -->
 <title><?=$g4_head_title?></title>
 <? if (isset($administrator)) { ?>
-<link rel="stylesheet" href="<?=G4_CSS_URL?>/adm.css?=<?=date("md")?>">
+<link rel="stylesheet" href="<?=G4_CSS_URL?>/admin.css?=<?=date("md")?>">
+<? if($contrast_use == 'on') { ?>
+<link rel="stylesheet" href="<?=G4_CSS_URL?>/admin_cr.css?=<?=date("md")?>">
+<? } ?>
 <? } else { ?>
 <link rel="stylesheet" href="<?=G4_CSS_URL?>/<?=$g4_css?>.css?=<?=date("md")?>">
+<? if($contrast_use == 'on') { ?>
+<link rel="stylesheet" href="<?=G4_CSS_URL?>/<?=$g4_css?>_cr.css?=<?=date("md")?>">
+<? } ?>
 <?}?>
 <!--[if lte IE 8]>
 <script src="<?=G4_JS_URL?>/html5.js"></script>
@@ -67,8 +81,10 @@ var g4_is_ie     = navigator.userAgent.toLowerCase().indexOf("msie") != -1;
 <script src="<?=G4_JS_URL?>/jquery-1.8.3.min.js"></script>
 <script src="<?=G4_JS_URL?>/common.js"></script>
 <script src="<?=G4_JS_URL?>/wrest.js"></script>
+<? if(G4_IS_MOBILE) { ?>
 <script>
     document.cookie = "device_width=" + screen.width;
 </script>
+<? } ?>
 </head>
 <body>
\ No newline at end of file
