434                 $white = $this->getBackColor($img);
439                 $white = $this->getBackColor($img);
445                 $white = $this->getBackColor($img);
453                 $white = $this->getBackColor($img);
466                 $tmpWhite = $this->getBackColor($tmpImg);
499                 $white = $this->getBackColor($img);
512                 $tmpWhite = $this->getBackColor($tmpImg);
546                 $white = $this->getBackColor($img);
571                 $tmpWhite = $this->getBackColor($tmpImg);
606                     $white = $this->getBackColor($img);
610                     $white = $this->getBackColor($img);
644                 $tmpWhite = $this->getBackColor($tmpImg);
680                     $white = $this->getBackColor($img);
684                     $white = $this->getBackColor($img);
723         $white = $this->getBackColor($img);
760         $white = $this->getBackColor($img);
798         $white = $this->getBackColor($result);
830         $white = $this->getBackColor($result);
872     public function getBackColor($img) {  function in RL\\PhpMathPublisher\\Helper