Change border colors in Word tables

Hi,
I'm using MS office X on OS 10.4.11 and I have a document
that is set up all in tables.
Some of the table cells have colored borders and in between
the colored-border tables, other cells have invisible
borders.
All of the colored borders are set up in the same color.

What I'd like to do is change the border colors on the
tables with colored borders all at once without having to go
through and re-do each table separately. I wonder if there
is a way to do this in Word?
Thanks in advance for any assistance,
--
Facts are stubborn, but statistics are more pliable.
Mark Twain