I'm not sure if I correctly mocked up your setup,
but I think I may have been able to change the format of both top and bottom headers
by going to the worksheet and right-clicking on the bottom header and selecting "Format".
I saw that using the Column Header Format menu while I was on the dashboard did
only change the top one.
I'd used the same fields in the dual axis (i.e. dualed-up Sales to Sales)
and so both the top and bottom header changed color together.
If I used different fields for top and bottom (i.e. Zero 2 and Zero3),
then the colors could be set individually.
209096cross.twbx 1.5 MB
This worked! Thank you. I didn't think to use different fields to be able to adjust for color.