Index: wp-content/themes/twentythirteen/functions.php
===================================================================
--- wp-content/themes/twentythirteen/functions.php	(revision 23482)
+++ wp-content/themes/twentythirteen/functions.php	(working copy)
@@ -552,8 +552,9 @@
  * @return void
  */
 function twentythirteen_customize_register( $wp_customize ) {
-	$wp_customize->get_setting( 'blogname' )->transport        = 'postMessage';
-	$wp_customize->get_setting( 'blogdescription' )->transport = 'postMessage';
+	$wp_customize->get_setting( 'blogname' )->transport         = 'postMessage';
+	$wp_customize->get_setting( 'blogdescription' )->transport  = 'postMessage';
+	$wp_customize->get_setting( 'header_textcolor' )->transport = 'postMessage';
 }
 add_action( 'customize_register', 'twentythirteen_customize_register' );
 
@@ -564,7 +565,7 @@
  * @since Twenty Thirteen 1.0
  */
 function twentythirteen_customize_preview_js() {
-	wp_enqueue_script( 'twentythirteen-customizer', get_template_directory_uri() . '/js/theme-customizer.js', array( 'customize-preview' ), '20130213', true );
+	wp_enqueue_script( 'twentythirteen-customizer', get_template_directory_uri() . '/js/theme-customizer.js', array( 'customize-preview' ), '20130225', true );
 }
 add_action( 'customize_preview_init', 'twentythirteen_customize_preview_js' );
 
Index: wp-content/themes/twentythirteen/js/theme-customizer.js
===================================================================
--- wp-content/themes/twentythirteen/js/theme-customizer.js	(revision 23482)
+++ wp-content/themes/twentythirteen/js/theme-customizer.js	(working copy)
@@ -17,4 +17,10 @@
 			$( '.site-description' ).text( to );
 		} );
 	} );
-} )( jQuery );
\ No newline at end of file
+	// Header text color
+	wp.customize( 'header_textcolor', function( value ) {
+		value.bind( function( to ) {
+			$( '.site-title a, .site-description' ).css( 'color',  to );
+		} );
+	} );
+} )( jQuery );
Index: wp-content/themes/twentythirteen/inc/custom-header.php
===================================================================
--- wp-content/themes/twentythirteen/inc/custom-header.php	(revision 23482)
+++ wp-content/themes/twentythirteen/inc/custom-header.php	(working copy)
@@ -114,7 +114,7 @@
 	?>
 		.site-title a,
 		.site-description {
-			color: #<?php echo esc_attr( $text_color ); ?> !important;
+			color: #<?php echo esc_attr( $text_color ); ?>;
 		}
 	<?php endif; ?>
 	</style>