diff --git a/docs/images/screenshot_list_emails.png b/docs/images/screenshot_list_emails.png
index c97e253ae20cd9dedecd117e1750fd3f29ba93bd..54d599c8394730ad80cdf42d8549aae2a9167ec6 100644
Binary files a/docs/images/screenshot_list_emails.png and b/docs/images/screenshot_list_emails.png differ
diff --git a/docs/images/screenshot_show_email.png b/docs/images/screenshot_show_email.png
index 274b1ca78ea0b34d854dd781eff065cc60d4dbde..f1ab6f3a1c8beda6315e46ba8f4e9dd28fc43f68 100644
Binary files a/docs/images/screenshot_show_email.png and b/docs/images/screenshot_show_email.png differ
diff --git a/docs/images/screenshot_show_html_email.png b/docs/images/screenshot_show_html_email.png
index 4fdf23e7b0b4deb1a6bdb7a8e3c8bad1a2e8d85d..ae8c6a5d5870666c53f2c5ab0a77a2407d4da7ea 100644
Binary files a/docs/images/screenshot_show_html_email.png and b/docs/images/screenshot_show_html_email.png differ
diff --git a/viewer.css b/viewer.css
index 1d1b8b0ebe3a140aaa64f13755e5dad2b22224ec..1fb1d8dc15557c6635b902c0eafd46cef5cf7dbe 100644
--- a/viewer.css
+++ b/viewer.css
@@ -15,6 +15,7 @@
     --msg-hover-bg: #fcfcfc;
 
     --box-bg: var(--darker-bg);
+    --box-strong-color: var(--titlebar-bg);
 
     --button-bg: #e8e8f0;
     --button-color: #667;
@@ -180,7 +181,10 @@ td a, td span{
     border-radius: 0.5em;
     text-align: center;
 }
-
+.box strong{
+    font-size: 160%;
+    color: var(--box-strong-color)
+}
 .right{
     float: right;
 }