diff --git a/webinterface.py b/webinterface.py
index 4028e531f..206cca1bd 100644
--- a/webinterface.py
+++ b/webinterface.py
@@ -2298,6 +2298,7 @@ def htmlHeader(cssFilename: str, css: str, lang='en') -> str:
             fontFormat + '" href="' + fontName + '" crossorigin>\n'
     htmlStr += '    <style>\n' + css + '</style>\n'
     htmlStr += '    <link rel="manifest" href="/manifest.json">\n'
+    htmlStr += '    <meta name="theme-color" content="grey">\n'
     htmlStr += '  </head>\n'
     htmlStr += '  <body>\n'
     return htmlStr
