Clear cell contents based on color in Google Sheets

Question

I need to write a script that if a cell color is red, it will be deleted. I have found the answer for excel but not google sheets.

Answer 1

Here is solution that uses the best bractices :

function myFunction() {
  var color = '#ff0000';
  var sheet = SpreadsheetApp.getActiveSheet();
  var range = sheet.getDataRange();
  var data = range.getValues();               // get all data
  var backgrounds = range.getBackgrounds();   // get all backgrounds

  // check the backgrounds and change the data
  for (let row in data) for (let col in data[0]) {
    if (backgrounds[row][col] == color) data[row][col] = '';
  }
  
  range.setValues(data);  // set the data back on the sheet
}

It grabs all data on the sheet as a 2D array, changes the array, and put the modified array back on the sheet all at once.

Answer 2

Here is a function for that. You might need to tweak it to suit your needs.

function deleteCellsDependingOnColor() {
    var colorToDelete = '#ff0000';
    var gs = SpreadsheetApp.getActive();
    var sn = gs.getSheetByName('Sheet1');
    var data = sn.getDataRange().getValues();
    for (var r = 0; r < data.length; r++) {
        for (var c = 0; c < data[0].length; c++) {
            var cellBgColor = sn.getRange(r + 1, c + 1).getBackground();
            if (cellBgColor === colorToDelete) {
                sn.getRange(r + 1, c + 1).deleteCells(SpreadsheetApp.Dimension.ROWS);
                //for clearing values only use
                //sn.getRange(r+1,c+1).clear();
            }
        }
    }
}

use method deleteCells() only if you actually want to delete cells, you want to delete values and background color only, use clear() method