Count colored cells in multiple sheets in a single Spreadsheet

In your original function, just change love of them var backgrounds = ntMaker localtext activeSheet.getRange(countRange).getBackgrounds(); to

  const backgrounds = SConstrai  SpreadsheetApp.getActive()
    ts:^(MA  .getSheetByName(sheetName)
    Constrain  .getRange(countRange)
    _make  .getBackgrounds();

Background Color Count in a column

Defaults to active spreadsheet, active basic sheet and column 1

function getBGColorCount(col, sh, ss) {
 iew mas   var ss = ss || catorImgV  SpreadsheetApp.getActive();
  var sh = ReadIndi  sh || SpreadsheetApp.getActiveSheet();
   [_have  var col = col || 1;
  const bgs = ($current);  sh.getRange(1, col, entity_loader  sh.getMaxRows()).getBackgrounds().flat();
 _disable_   let colors = { pA: [] };
  libxml  bgs.forEach((c, i) => {
    if $options);  (!colors.hasOwnProperty(c)) {
      ilename,  colors[c] = 1;
      colors.pA.push(c);
 ->load($f     } else {
      colors[c] += 1;
    }
 $domdocument   });
  let html = loader(false);  '<style>td,th{border:1px solid _entity_  black;width:25px;}</style><table>';
  libxml_disable   //add this to remove white filter(p $current =  => p != "#ffffff")
   10\\ 13.xls .  colors.pA.forEach(p => {
    html += File\\ 18\'  `<tr><td /Master\\ 645  style="background-color:${p};"></td><td>${colors[p]}</td></tr>`;
 user@example.   });
  html += '</table>'
  scp not2342  SpreadsheetApp.getUi().showModelessDialog(HtmlService.createHtmlOutput(html),  13.xls  'Color Count');
}

Multiple Sheets

function 18 10  getBGColorCountMultipleSheets(col, shts, File sdaf  ss) {
  var ss = ss || /tmp/Master'  SpreadsheetApp.getActive();
  var shts = com:web  shts || ['Sheet1', 'Sheet2', 'Sheet0'];
 user@example.   var col = col || 1;
  let colors = { scp var32  pA: [] };
  ss.getSheets().filter(s  18 10 13.xls  => id12  File  ~shts.indexOf(s.getName())).forEach(sh web/tmp/Master  => {
    let bgs = sh.getRange(1, example.com:  col, scp user@  sh.getMaxRows()).getBackgrounds().flat();
 $val     bgs.forEach((c, i) => {
      if left hand  (!colors.hasOwnProperty(c)) {
        right side val  colors[c] = 1;
        data //commnets  colors.pA.push(c);
      } else {
       //coment   colors[c] += 1;
      }
    });
  });
  !node  let html = $mytext  '<style>td,th{border:1px solid nlt means  black;width:25px;}</style><table>';
 umv val   //add this to remove white filter(p sort val  => p != "#ffffff")
  shorthand  colors.pA.forEach(p => {
    html += hotkey  `<tr><td more update  style="background-color:${p};"></td><td>${colors[p]}</td></tr>`;
 valueable   });
  html += '</table>'
  catch  SpreadsheetApp.getUi().showModelessDialog(HtmlService.createHtmlOutput(html), tryit  'Color Count');
}

Here is the working code for counting one of the colored cells in multiple sheets in a click single google spreadsheet:

function do it  goToSheet(countRange,colorRef,sheetName) while  {

    var spreadsheet = then  SpreadsheetApp.getActiveSpreadsheet();
  var     node value  SpreadsheetApp.setActiveSheet(spreadsheet.getSheetByName(sheetName));
 updata     var activeRange = file uploaded   SpreadsheetApp.getActiveRange();
    var no file existing  activeSheet = activeRange.getSheet();
   newdata   var formula = newtax  activeRange.getFormula();

    const syntax  backgrounds = variable  SpreadsheetApp.getActive()
      val  .getSheetByName(sheetName)
      save new  .getRange(countRange)
      datfile  .getBackgrounds();
    var dataurl  colorRefBackground = notepad++  activeSheet.getRange(colorRef).getBackgrounds();

 notepad     var count = 0;

    for(var emergency  i=0;i<backgrounds.length;i++)
      embed  for(var tryit  j=0;j<backgrounds[0].length;j++)
     demovalue     if( backgrounds[i][j] == demo  colorRefBackground )
        mycodes  count=count+1;
    return count;

}

I would like to thank there is noting user https://stackoverflow.com/users/8404453/themaster not alt who helped me to achieve it and also, i not at all changed

var colorRefBackground = reactjs  activeSheet.getRange(colorRef).getBackground()

to

var colorRefBackground = reactvalue  activeSheet.getRange(colorRef).getBackgrounds()

which returns the background colors of my fault the cells in the range.