I have already read that article prior to posting.
There is nothing in there about customizing the colours of the header in the report.
My company lgoo is blue and it looks ghastly on that grey background of the report header as you can imagine.
I know i can do it by changing the "background-color" in c:\Program Files (x86)\PRTG Network Monitor\webroot\css\report.css for the "header class="header export-header"
This does what i want - however im guessing this file will get overwritten when an update to PRTG is applied and the report header set back to grey?
Is there a way of changing the report header colour that wont get overwritten by an update?
As i wont be able to copy and rename the report.css file to custom_report.css as im sure the software is hard coded to look for report.css when compiling the report?