<!DOCTYPE html>
<html>
<style>
  body {
    padding:  0;
    margin:  0;
  }
  .block {
    width:  100px;
    height:  100px;
    padding:  0;
    display:  inline-block;
    background:  rgb(0, 127, 0);
    margin:  10px;
  }
</style>
<body>
  <div class="block"></div>
</body>
</html>
