I'm trying to make an atlas with qgis with a map generating 2 pages (north and south) N and S corresponding to the coverage layer where a field contains the values "N", "S". Every page is formed by the map zoomed on N or S (this is not a problem) and a part where I want the 2 value "N" e "S" changing the font-color: N red and S grey if the atlas zoom the north, N grey and S red if the atlas zoom the south.
I think I can use a conditional expression with label but I'm not able find a way.
To clarify, my problem is the realization of N and S outside the map in the layout with different color: