<!doctype html>
<html>
  <head>
    <title>style: border, padding, background</title>
    <meta charset="utf-8"/>
  </head>

  <body>

    <!-- This verifies border, padding and background on a MathML element -->
    <math style="position: absolute; top: 0; left: 0;">
      <mrow style="color: green; background-color: yellow; padding: 3px 6px 9px 12px; border: solid; border-width: 1px 2px 3px 4px;">
        <mspace width="10px" height="10px" mathbackground="red"/>
      </mrow>
    </math>

  </body>
</html>