<!DOCTYPE html>
<html>
  <head>
    <style>
      label {color: green}
    </style>
  </head>
  <body>
    <form>
      <input type="checkbox" name="group1" id="one" value="1"/>
      <label id="l1" for="one">Should be no red</label><br>
      <input type="checkbox" name="group1" id="two" value="2" checked="checked"/>
      <label id="l2" for="two">Should be no red</label>
    </form>
  </body>
</html>