Theme Help - Message Colour

Hi, can anybody help with a theme question. I am trying to set the background similar to the photo. It seems to be working when I select some messages but others are all white - not sure why?
Does anybody know which setting is causing this?

lunes 13 diciembre 2021 :: 2213hrs (UTC +01:00)

Hi @Mike_Pugh

This is governed by a combination of a number elements you can select here:

Menu ->Settings ->Mail ->Read ->Preferred Style

You make adjustments here to suit your preference

¡Saludos desde la soleada Valencia en España!


Hablo español, luego portugués e inglés, con conocimiento de varios otros idiomas.