[softwarelist] Transparent text background colour in Ovation Pro

In an Ovation Pro document I am using a text frame with light grey text behind 
the main frame as a "watermark".  I would like the watermark to be visible even 
where text has a background colour. Is there any way of setting a text 
background colour which appears normal if there is nothing (i.e. white) behind 
it but allows any non-white colour to show through?

One solution (albeit slightly awkward) is to duplicate the main text frame then 
sandwich the watermark between the two frames with the following settings:
   Top frame:        Text foreground black, background transparent throughout
   Middle frame:    The watermark
   Bottom frame:   Text foreground transparent, background coloured (where 
needed)
with the bottom frame aligned beneath the top frame.  This works OK but I 
wonder if anyone has a suggestion for something more straightforward?

Thanks & regards
John Grogan

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