function getBackgroundColor(rangeSpecification) {
  var sheet = SpreadsheetApp.getActiveSpreadsheet();
  return sheet.getRange(rangeSpecification).getBackgroundColor();

}

function sumWhereBackgroundColorIs(color, rangeSpecification) {

  var sheet = SpreadsheetApp.getActiveSpreadsheet();
  var range = sheet.getRange(rangeSpecification);

  var x = 0;

  for (var i = 1; i <= range.getNumRows(); i++) {
    for (var j = 1; j <= range.getNumColumns(); j++) {

      var cell = range.getCell(i, j);

      if(cell.getBackgroundColor() == color)
        x += parseFloat(cell.getValue());
    }
  }

  return x;
}

function countCellsWithBackgroundColor(color, rangeSpecification) {

  var sheet = SpreadsheetApp.getActiveSpreadsheet();
  var range = sheet.getRange(rangeSpecification);

  var x = 0;

  for (var i = 1; i <= range.getNumRows(); i++) {
    for (var j = 1; j <= range.getNumColumns(); j++) {

      var cell = range.getCell(i, j);

      if(cell.getBackgroundColor() == color)
        x++;
    }
  }

  return x;
}