Poll table colours - how to get rid of?

I want the tables that it uses to display the poll & results to not have any background colour so that whatever is behind them will show through - in other words make them transparent.

The settings page in admin insists on a value being typed into the colour boxes - the javascript validation won't let you leave them blank therefore my solution was to remove the following from the template:

bgcolor="$pollvars[bgcolor_fr]"

which is an attribute of the <table> tag

This works great for displaying the vote options but when it displays the results of the poll it still puts in the table background colour.

Anyone know where the other template is that I need to edit?

Thanks
AW

I should also point out that as well as removing

bgcolor="$pollvars[bgcolor_fr]"

i also removed

bgcolor="$pollvars[bgcolor_tab]"

Both of them I want transparent - no colour set.

Thanks
AW