<!doctype html>
<html>
  <head>
    <title>fractions color</title>
    <meta charset="utf-8"/>
  </head>
  <body>

    <!-- This test verifies that the CSS color property applies to the fraction 
         bar. Here, it should be painted in blue. -->
    <math style="color: black;">
      <mfrac style="color: blue;">
        <mi style="color: black;">A</mi>
        <mi style="color: black;">B</mi>
      </mfrac>
    </math>

  </body>
</html>