<!DOCTYPE html>
<html>

  <head>
    <link rel="stylesheet" href="style.css">
   
  </head>

  <body>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, 
    sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</p> 
    
    <p class="colorado">Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> 
    
    <p class="colorado">Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.</p>
    
   <p> Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum</p>
  </body>
  
   <script src="script.js"></script>

</html>
// Code goes here

var todosParrafos = document.querySelectorAll('p');

for (var i=0, len=todosParrafos.length; i < len; i++) {
    if ( todosParrafos[i].classList.contains('colorado') ) {
      todosParrafos[i].setAttribute('style', 'color:#900;');
    }
}
/* Styles go here */