PHP alternating colors

  $dbc = mysql_connect('localhost','root','') or die (mysql_error());
  mysql_select_db('payroll') or die (mysql_error());
 $sql = "SELECT * FROM employee ORDER BY employee_id DESC";

  $result = mysql_query($sql);


  while($row = mysql_fetch_array($result)) {

  echo "
  
  ".$row['first_name']." ".$row['last_name']."
   
  
  ";


  }

I wanted to add an alternating color in the loop. what code should I add?

Answer

$rowCount = 0;
$colorOne = '#ffffff';
$colorTwo = '#f3f3f3';

while($row = mysql_fetch_array($result)){

        $rowColor = ($rowCount % 2) ? $colorOne : $colorTwo; 
        echo "";
$rowCount++;
}

Edited after @Jayrox comment.