diff --git a/include/tcpdf_colors.php b/include/tcpdf_colors.php
index 7f337f31..5a51594c 100644
--- a/include/tcpdf_colors.php
+++ b/include/tcpdf_colors.php
@@ -275,7 +275,7 @@ public static function convertHTMLColorToDec($hcolor, &$spotc, $defcol=array('R'
 		$color = strtolower($color);
 		// check for javascript color array syntax
 		if (strpos($color, '[') !== false) {
-			if (preg_match('/[\[][\"\'](t|g|rgb|cmyk)[\"\'][\,]?([0-9\.]*)[\,]?([0-9\.]*)[\,]?([0-9\.]*)[\,]?([0-9\.]*)[\]]/', $color, $m) > 0) {
+			if (preg_match('/[\[][\"\'](t|g|rgb|cmyk)[\"\'][\,]?([0-9\.]*+)[\,]?([0-9\.]*+)[\,]?([0-9\.]*+)[\,]?([0-9\.]*+)[\]]/', $color, $m) > 0) {
 				$returncolor = array();
 				switch ($m[1]) {
 					case 'cmyk': {