brand color updates

_layouts/default.html

@@ -12,7 +12,7 @@
     <link rel="apple-touch-icon" sizes="180x180" href="/images/icons/apple-touch-icon.png">
     <link rel="icon" type="image/png" sizes="32x32" href="/images/icons/favicon-32x32.png">
     <link rel="icon" type="image/png" sizes="16x16" href="/images/icons/favicon-16x16.png">
-    <link rel="mask-icon" href="/images/icons/safari-pinned-tab.svg" color="#3c8dbc">
+    <link rel="mask-icon" href="/images/icons/safari-pinned-tab.svg" color="#175DDC">
     <link rel="manifest" href="/manifest.json">
 </head>