diff --git a/index.php b/index.php
index 85a8008..1ac59bd 100644
--- a/index.php
+++ b/index.php
@@ -359,7 +359,7 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
         $articleRows = '
           <tr>
             <td style="padding:0 32px 22px 32px;" class="mobile-padding">
-              <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" style="width:100%;border:1px solid #d7dee8;background:#ffffff;border-radius:14px;">
+              <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" style="width:100%;border:1px solid #d8e0ea;background:#ffffff;border-radius:14px;">
                 <tr>
                   <td style="padding:22px;font-family:Arial,Helvetica,sans-serif;font-size:15px;line-height:23px;color:#2e3b4d;">
                     Für diesen Zeitraum wurden keine neuen Artikel gefunden.
@@ -375,17 +375,17 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
             <td style="padding:0 32px 18px 32px;" class="mobile-padding">
               <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" style="width:100%;background:#ffffff;border:1px solid #d7dee8;border-radius:14px;">
                 <tr>
-                  <td style="padding:18px 22px 4px 22px;font-family:Arial,Helvetica,sans-serif;font-size:12px;line-height:17px;color:#6a7688;font-weight:700;letter-spacing:.4px;text-transform:uppercase;">
+                  <td style="padding:18px 22px 4px 22px;font-family:Arial,Helvetica,sans-serif;font-size:12px;line-height:17px;color:#5f6d82;font-weight:700;letter-spacing:.4px;text-transform:uppercase;">
                     Wiki-Beitrag
                   </td>
                 </tr>
                 <tr>
-                  <td style="padding:0 22px 8px 22px;font-family:Arial,Helvetica,sans-serif;font-size:23px;line-height:31px;font-weight:700;color:#122845;">
-                    <a href="' . h($article['url']) . '" target="_blank" style="color:#122845;text-decoration:none;">' . h($article['title']) . '</a>
+                  <td class="mobile-card-title" style="padding:0 22px 8px 22px;font-family:Arial,Helvetica,sans-serif;font-size:23px;line-height:31px;font-weight:700;color:#003b6f;">
+                    <a href="' . h($article['url']) . '" target="_blank" style="color:#003b6f;text-decoration:none;">' . h($article['title']) . '</a>
                   </td>
                 </tr>
                 <tr>
-                  <td style="padding:0 22px 16px 22px;font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:22px;color:#334257;">
+                  <td style="padding:0 22px 16px 22px;font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:22px;color:#2f4159;">
                     Veröffentlicht am ' . h($article['date_de']) . ' von ' . h($article['author']) . '.
                   </td>
                 </tr>
@@ -393,7 +393,7 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
                   <td style="padding:0 22px 20px 22px;">
                     <table role="presentation" border="0" cellspacing="0" cellpadding="0">
                       <tr>
-                        <td bgcolor="#ef7d00" style="background:#ef7d00;">
+                        <td bgcolor="#f39200" style="background:#f39200;">
                           <a href="' . h($article['url']) . '" target="_blank" style="display:inline-block;padding:11px 18px;font-family:Arial,Helvetica,sans-serif;font-size:13px;line-height:16px;font-weight:700;color:#ffffff;text-decoration:none;">Artikel lesen</a>
                         </td>
                       </tr>
@@ -434,7 +434,7 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <title>Thomas-Krenn Wiki Newsletter</title>
   <style type="text/css">
-    html, body { margin:0 !important; padding:0 !important; width:100% !important; background:#e8edf3; }
+    html, body { margin:0 !important; padding:0 !important; width:100% !important; background:#edf1f5; }
     table, td { border-collapse:collapse; mso-table-lspace:0pt; mso-table-rspace:0pt; }
     img { border:0; outline:none; text-decoration:none; -ms-interpolation-mode:bicubic; display:block; }
     a { text-decoration:none; }
@@ -449,26 +449,26 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
     }
   </style>
 </head>
-<body style="margin:0;padding:0;background:#e8edf3;">
+<body style="margin:0;padding:0;background:#edf1f5;">
   <div class="preheader">' . h($preheader) . '&nbsp;&zwnj;&nbsp;&zwnj;&nbsp;&zwnj;</div>
-  <center role="article" aria-roledescription="email" lang="de" style="width:100%;background:#e8edf3;">
-    <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" bgcolor="#e8edf3" style="width:100%;background:#e8edf3;">
+  <center role="article" aria-roledescription="email" lang="de" style="width:100%;background:#edf1f5;">
+    <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" bgcolor="#edf1f5" style="width:100%;background:#edf1f5;">
       <tr>
         <td align="center" style="padding:22px 10px;">
-          <table role="presentation" width="700" border="0" cellspacing="0" cellpadding="0" class="email-container" style="width:100%;max-width:700px;background:#ffffff;">
+          <table role="presentation" width="700" border="0" cellspacing="0" cellpadding="0" class="email-container" style="width:100%;max-width:700px;background:#ffffff;border-top:4px solid #f39200;">
             <tr>
-              <td align="center" style="padding:24px 32px 18px 32px;">
-                <img src="https://www.thomas-krenn.com/res/pics/tk_logo_340px.png" width="182" alt="Thomas-Krenn Logo" style="display:block;margin:0 auto;border:0;outline:none;text-decoration:none;height:auto;">
+              <td align="center" style="padding:24px 32px 18px 32px;background:#003b6f;" class="mobile-padding">
+                <img src="https://www.thomas-krenn.com/res/pics/tk_logo_340px.png" width="190" alt="Thomas-Krenn Logo" style="display:block;margin:0 auto;border:0;outline:none;text-decoration:none;height:auto;">
               </td>
             </tr>
             <tr>
               <td style="padding:0 32px;" class="mobile-padding">
-                <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" style="width:100%;background:#102a46;">
+                <table role="presentation" width="100%" border="0" cellspacing="0" cellpadding="0" style="width:100%;background:#003b6f;">
                   <tr>
                     <td style="padding:30px 26px;font-family:Arial,Helvetica,sans-serif;">
-                      <div style="font-size:12px;line-height:16px;font-weight:700;color:#ef7d00;letter-spacing:1px;text-transform:uppercase;">Thomas-Krenn Wiki Update</div>
+                      <div style="font-size:12px;line-height:16px;font-weight:700;color:#f39200;letter-spacing:1px;text-transform:uppercase;">Thomas-Krenn Wiki Update</div>
                       <div class="mobile-headline" style="font-size:36px;line-height:42px;font-weight:700;color:#ffffff;margin-top:10px;">' . h($periodLabel) . '</div>
-                      <div style="font-size:16px;line-height:24px;color:#bfd0e2;margin-top:10px;">' . h($summaryText) . '</div>
+                      <div style="font-size:16px;line-height:24px;color:#d8e4f0;margin-top:10px;">' . h($summaryText) . '</div>
                     </td>
                   </tr>
                 </table>
@@ -495,7 +495,7 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
                   <tr>
                     <td style="font-family:Arial,Helvetica,sans-serif;font-size:15px;line-height:24px;color:#2a3950;">
                       Haben Sie Fragen oder einen Themenwunsch?
-                      <a href="' . h($replyHref) . '" style="color:#ef7d00;text-decoration:underline;">Schreiben Sie uns gerne direkt.</a><br><br>
+                      <a href="' . h($replyHref) . '" style="color:#f39200;text-decoration:underline;">Schreiben Sie uns gerne direkt.</a><br><br>
                       Viele Gruesse<br>
                       Ihr Thomas-Krenn Team
                     </td>
@@ -504,10 +504,10 @@ function buildNewsletterHtml(array $config, array $articles, string $periodLabel
               </td>
             </tr>
             <tr>
-              <td style="background:#0f243d;padding:26px 26px;text-align:center;font-family:Arial,Helvetica,sans-serif;">
+              <td style="background:#003b6f;padding:26px 26px;text-align:center;font-family:Arial,Helvetica,sans-serif;">
                 <div style="font-size:12px;line-height:20px;color:#b8c5d4;">
                   Tel.: +49 8551 9150 0 | Fax: +49 8551 9150 55<br>
-                  <a href="https://www.thomas-krenn.com/de/wiki/Hauptseite" target="_blank" style="color:#ef7d00;text-decoration:underline;">thomas-krenn.com</a><br><br>
+                  <a href="https://www.thomas-krenn.com/de/wiki/Hauptseite" target="_blank" style="color:#f39200;text-decoration:underline;">thomas-krenn.com</a><br><br>
                   Thomas-Krenn.AG | Speltenbach-Steinaecker 1 | D-94078 Freyung
                   ' . $unsubscribeFooter . '
                 </div>