code: public function setARGB($pValue)
      {
          if ($pValue == '') {
              $pValue = self::COLOR_BLACK;
          }
          if ($this->isSupervisor) {
              $styleArray = $this->getStyleArray(['argb' => $pValue]);
              $this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
          } else {
              $this->argb = $pValue;
          }
  
          return $this;
      }
docs: Set ARGB.
  
  @param string $pValue see self::COLOR_*
  
  @return Color