Google Sheets set cell background color based on named range background color

onEditHighlight.js

    
var stages = SpreadsheetApp.getActiveSpreadsheet().getRangeByName("Stages")

function onEdit(e) {//"e" receives the event object
  var range = e.range;//The range of cells edited
  var value = e.value;//the new value in the cell
  var columnOfCellEdited = range.getColumn();//Get column number
  
  if (columnOfCellEdited !== 1) {
    return;
  };
  
  const stageValues = stages.getValues();
  log("stages is shaped (" + stageValues.length + " x " + stageValues[0].length + ")");

  var position = stageValues[0].indexOf(value);
  if (position === -1) {
    log("could not find " + value + " in " + stages.getValues());
    return
  }

  var stage = stages.getCell(1, position + 1);

  var bgcolor = stage.getBackground();
  range.setBackground(bgcolor);
  
  return
};
      
function log(line) {
  Logger.log(line)
  console.log(line)
}