Get parent element colors

[Simon]

Hi,

I have a table that the user can specify their own colors, (using CSS or
HTML).
How can I retrieve the font-color and background-color of the element?

So I would have something like

<table>
<tr>
<td>
<!--
// echo a text to give the background color using the font text.
//-->
</td>
</tr>
</table>

How could I do that?

Simon