Using Google font: Roboto

theme/site/globals/site.overrides

@@ -1,5 +1,3 @@
 /*******************************
          Site Overrides
 *******************************/
-
-@importGoogleFonts: false;

theme/site/globals/site.variables

@@ -1,7 +1,17 @@
 /*******************************
      User Global Variables
 *******************************/
-@importGoogleFonts: false;
+
+@importGoogleFonts: true;
+
+@fontName  : 'Roboto Mono';
+
+@emSize      : 14px;
+@fontSize    : 13px;
+
+/*-------------------
+    Site Colors
+--------------------*/
 
 @primaryColor: #3CB5B5;
 @secondaryColor: #43C9C9;
@@ -18,9 +28,11 @@
 @brown:#6B5B4C;
 @grey:#42495F;
 
+@pageBackground      : #FDFDFA;
+
+
 /*******************************
          PXT Overrides
 *******************************/
 
-@backgroundColor: #FDFDFA;
 @blocklyToolboxColor: #F6F4E6;

theme/style.less

@@ -32,6 +32,9 @@
     &:extend(.yellow all);
 }
 
+/*******************************
+             Blockly
+*******************************/
 
 .blocklyTreeRow {
     border-radius:5px;
@@ -44,7 +47,7 @@
 
 /* Blockly Text */
 .blocklyTreeLabel {
-    font-family: "Gotham SSm A","Gotham SSm B","Montserrat","Lucida Grande","Lucida Sans Unicode","Lucida Sans",Geneva,Verdana,sans-serif  !important;
+    font-family: @pageFont !important;
 }
 
 .blocklyTreeLabel {

theme/theme.config

@@ -91,7 +91,4 @@
 
 @fontPath  : 'fonts';
 
-@headerFont        : 'Segoe UI', 'Helvetica Neue', Arial, Helvetica, sans-serif;
-@pageFont          : 'Segoe UI', 'Helvetica Neue', Arial, Helvetica, sans-serif;
-
 /* End Config */