How to highlight only first Totals row in the pivot table?

[Peony]

Hi all.
Please advise whether there are any options to highlight, in colour, only the very top Totals in a pivot table.
I have a table like the one below and tried to solve this issue using the Dimensionality() function. For some reason, my formula does not work. 
=If(Dimensionality() = 0,LightGray(), White())

[marcus_sommer]

It seems to be working - at least to Quarter - but you will probably need to set this customization to each column.

[Nagaraju_KCS · Accepted solution]

That should work, you have to write same expression in all the Dimensions and Measures for Background color expression

=If(Dimensionality() = 0, RGB(200, 200, 200), White())

[Peony]

@Nagaraju_KCS you are right. Thank you.