diff --git src/wp-content/themes/twentyfifteen/js/color-scheme-control.js src/wp-content/themes/twentyfifteen/js/color-scheme-control.js
index 1aff097..91ae498 100644
--- src/wp-content/themes/twentyfifteen/js/color-scheme-control.js
+++ src/wp-content/themes/twentyfifteen/js/color-scheme-control.js
@@ -1,4 +1,4 @@
-/* global colorScheme */
+/* global colorScheme, Color */
 /**
  * Add a listener to the Color Scheme control to update other color controls to new values/defaults.
  * Also trigger an update of the Color Scheme CSS when a color is changed.
@@ -57,12 +57,12 @@
 		});
 
 		// Add additional colors.
-		colors['secondary_textcolor'] = Color( colors.textcolor ).toCSS( 'rgba', 0.7 );
-		colors['border_color'] = Color( colors.textcolor ).toCSS( 'rgba', 0.1 );
-		colors['border_focus_color'] = Color( colors.textcolor ).toCSS( 'rgba', 0.3 );
-		colors['secondary_sidebar_textcolor'] = Color( colors.sidebar_textcolor ).toCSS( 'rgba', 0.7 );
-		colors['sidebar_border_color'] = Color( colors.sidebar_textcolor ).toCSS( 'rgba', 0.1 );
-		colors['sidebar_border_focus_color'] = Color( colors.sidebar_textcolor ).toCSS( 'rgba', 0.3 );
+		colors.secondary_textcolor = Color( colors.textcolor ).toCSS( 'rgba', 0.7 );
+		colors.border_color = Color( colors.textcolor ).toCSS( 'rgba', 0.1 );
+		colors.border_focus_color = Color( colors.textcolor ).toCSS( 'rgba', 0.3 );
+		colors.secondary_sidebar_textcolor = Color( colors.sidebar_textcolor ).toCSS( 'rgba', 0.7 );
+		colors.sidebar_border_color = Color( colors.sidebar_textcolor ).toCSS( 'rgba', 0.1 );
+		colors.sidebar_border_focus_color = Color( colors.sidebar_textcolor ).toCSS( 'rgba', 0.3 );
 
 		return cssTemplate( colors );
 	}
@@ -70,7 +70,7 @@
 	// Update the CSS whenever a color setting is changed.
 	_.each( colorSettings, function( setting ) {
 		api( setting, function( setting ) {
-			setting.bind( _.throttle( function( value ) {
+			setting.bind( _.throttle( function() {
 				api( 'color_scheme_css' ).set( getCSS() );
 			}, 250 ) );
 		} );