Currently, there is no way to change the colour of the red box (the week header) at the top of the PDF timetables.
Even though there are various CSS options to change colours, this is not one of them.
It means that our timetables look a tad unprofessional to parents, as our logo clashes with the red background of that box.
Hopefully, this is a quick change for the development team.
I attach the example of the red box from the iSAMS documentation as illustration.