diff --git a/src/wp-content/themes/twentyfifteen/inc/custom-header.php b/src/wp-content/themes/twentyfifteen/inc/custom-header.php
index bf8655a73f..a09bb6b445 100644
--- a/src/wp-content/themes/twentyfifteen/inc/custom-header.php
+++ b/src/wp-content/themes/twentyfifteen/inc/custom-header.php
@@ -58,11 +58,11 @@ add_action( 'after_setup_theme', 'twentyfifteen_custom_header_setup' );
 function twentyfifteen_hex2rgb( $color ) {
 	$color = trim( $color, '#' );
 
-	if ( strlen( $color ) == 3 ) {
+	if ( strlen( $color ) === 3 ) {
 		$r = hexdec( substr( $color, 0, 1 ) . substr( $color, 0, 1 ) );
 		$g = hexdec( substr( $color, 1, 1 ) . substr( $color, 1, 1 ) );
 		$b = hexdec( substr( $color, 2, 1 ) . substr( $color, 2, 1 ) );
-	} elseif ( strlen( $color ) == 6 ) {
+	} elseif ( strlen( $color ) === 6 ) {
 		$r = hexdec( substr( $color, 0, 2 ) );
 		$g = hexdec( substr( $color, 2, 2 ) );
 		$b = hexdec( substr( $color, 4, 2 ) );