diff --git a/html/login.php b/html/login.php
index 3fcec7dd..b1f1ad4b 100644
--- a/html/login.php
+++ b/html/login.php
@@ -43,7 +43,7 @@ if(isset($_POST['username']) && isset($_POST['password'])) {
     <link rel="icon" href="src/img/favicon.ico">
     <title><?=$title?></title>
 </head>
-<body>
+<body class='<?=$_SESSION['colormode']?>'>
     <header>
         <div class="pancontent">
             <div class="athena-container">
diff --git a/html/news.php b/html/news.php
index fe6ecaf7..5db9d62e 100644
--- a/html/news.php
+++ b/html/news.php
@@ -17,7 +17,7 @@ if (filter_var($_GET['article'], FILTER_VALIDATE_INT)) {
     <link rel="icon" href="src/img/favicon.ico">
     <title><?=$title?></title>
 </head>
-<body>
+<body class='<?=$_SESSION['colormode']?>'>
     <header>
         <div class="pancontent">
             <div class="athena-container">
diff --git a/html/register.php b/html/register.php
index 1a704961..12467cee 100644
--- a/html/register.php
+++ b/html/register.php
@@ -43,7 +43,7 @@ if(isset($_POST['username']) && isset($_POST['password']) && isset($_POST['passw
     <link rel="icon" href="src/img/favicon.ico">
     <title><?=$title?></title>
 </head>
-<body>
+<body class='<?=$_SESSION['colormode']?>'>
     <header>
         <div class="pancontent">
             <div class="athena-container">
diff --git a/html/upload.php b/html/upload.php
index 6dd3f6f0..96457121 100644
--- a/html/upload.php
+++ b/html/upload.php
@@ -47,7 +47,7 @@ if(isset($_POST['page-content'])) {
         }
     </style>
 </head>
-<body>
+<body class='<?=$_SESSION['colormode']?>'>
     <header>
         <div class="pancontent">
             <div class="athena-container">
diff --git a/html/users.php b/html/users.php
index 522d9021..44152c34 100644
--- a/html/users.php
+++ b/html/users.php
@@ -32,7 +32,7 @@ if(isset($_POST['userid']) && isset($_POST['role']) && isset($_POST['accreditati
     <link rel="icon" href="src/img/favicon.ico">
     <title><?=$title?></title>
 </head>
-<body>
+<body class='<?=$_SESSION['colormode']?>'>
     <header>
         <div class="pancontent">
             <div class="athena-container">
