I reply to myself, that perhaps will help someone someday !!
I set the background color of modules to “transparent” sa that th enew one created beside th eogo has the header background without affect other modules.
Remained the border color of the module which one I set to the header background color as that it’s not visible in th eheader beside the logo. The inconvenient is that all other modules borders are now the sames as the header one but it’s acceptable for the moment. I reduced the margin-bottom at 5px instead of 20 to not get a too large height of my header. The only problem left is the padding of my banner.
These modifications are to be made in Template.css (if somebody may be interested)
