Sorry for late to reply.
You are right. It'll gives you a blank column.
Last thing that I can do is (maybe not suitable with you):
To highlight column 'No' with black colour.
In my test I create a formula 'xYes' and make it as column.
It will gives me 2 columns 'Yes' and 'No'.
Then I make a 'highlight' for column 'No' with formula:
if value xYes='No' then
- font colour = black
- background colour = black
And I make it samething with the result.
So for column 'No' it will gives me black column.
hope it help.
Or maybe someone else can give better idea/solutions for you.