1. diff --git a/html/includes/graphs/generic_multi_line.inc.php b/html/includes/graphs/generic_multi_line.inc.php
2. index d80c2b4d7..5d4b18548 100644
3. --- a/html/includes/graphs/generic_multi_line.inc.php
4. +++ b/html/includes/graphs/generic_multi_line.inc.php
5. @@ -42,7 +42,7 @@ foreach ($rrd_list as $rrd) {
6.      }
7.  
8.      if (!empty($rrd['area']) && empty($rrd['areacolour'])) {
9. -        $rrd['areacolour'] = $colour . "20";
10. +        $rrd['areacolour'] = substr($colour, 0, 6) . "20";
11.      }
12.  
13.      $ds = $rrd['ds'];
14.