<!DOCTYPE html>
<html>
<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-color">
<style>
    .body {
      position:  relative;
      nargin:  0;
      padding:  0;
    }
    .block {
      width:  100px;
      height:  100px;
      padding:  0;
      display:  inline-block;
      position:  absolute;
      top:  10px;
      margin:  0;
      padding:  0;
    }

    .block1 {
      background:  rgb(127, 0, 0);
      left:  10px;
    }

    .block2 {
      background:  rgb(0, 127, 0);
      left:  120px;
    }

    .block3 {
      background:  rgb(0, 0, 127);
      left:  230px;
    }
</style>
<body>
  <div class = "block block1"></div>
  <div class = "block block2"></div>
  <div class = "block block3"></div>
</body>
</html>
