before
  
              $str .= '<div class="details">';
            $str .= get_string('mysubmission', 'assign');
            $submission = $mysubmissions[$assignment->id];
            if ($submission->nosubmissions) {
                $str .= get_string('offline', 'assign');
            } else if (!$submission->status || $submission->status == 'draft') {
                $str .= $strnotsubmittedyet;
            } else {
                $str .= get_string('submissionstatus_' . $submission->status, 'assign');
            }
            if (!$submission->grade || $submission->grade < 0) {
                $str .= ', ' . get_string('notgraded', 'assign');
            } else {
                $str .= ', ' . get_string('graded', 'assign');
            }
            $str .= '</div>';
  
  
  after:
  
  $str .= '<div class="details">';
            $str .= get_string('mysubmission', 'assign');
            $submission = $mysubmissions[$assignment->id];
            if ($submission->nosubmissions) {
                $str .= get_string('offline', 'assign');
            } else if (!$submission->status || $submission->status == 'draft') {
                $str .="<b STYLE='color:Red;'>". $strnotsubmittedyet . "</b>";
            } else {
                $str .= "<b STYLE='color:Orange;'>" . get_string('submissionstatus_' . $submission->status, 'assign') ."</b>" ;
            }
            if (!$submission->grade || $submission->grade < 0) {
                $str .= ', '. "<b STYLE='color:Red;'>" . get_string('notgraded', 'assign') ."</b>" ;
            } else {
                 $str = str_replace("Orange", "Green", $str);
                 $str = str_replace("Red", "Green", $str);
                 $str .= ', ' ."<b STYLE='color:Green;'>" . get_string('graded', 'assign') . "</b>" ;
            }
            $str .= '</div>';