Setting the colour of the overall Column Header in a Pivot Table

Hi

I have this analysis:

If I set the colour of the Rows Header here, it changes the individual rows and the overall Row Header:
image

Eg, if I change it to blue, I get:

The corresponding format for columns is here:
image

If I change that to green I get:

The overall Column Header colour is not changed.

Is this a bug?

Is there a workaround? I cannot see anywhere else where I can influence the colour of the overall Column Header.

TIA
J

An update …

If I drag the field from the Columns field well to the Rows field well, the overall header picks up the desired colour. If I drag it back to the Columns field well, it goes back to black!