@etiennesegonzac I know what you mean, unfortunately #F97C17 is an specific color we should no be setting in the app as is related to the skin applied to the header, this should only be defined in the BB. Mainly because now comms headers are green.
If you want to keep using this fake header I would suggest having an empty `<header>` in the html and when the new tab content is loaded could go on top of it.