Hello everyone,
I am happy to announce with all of you that phpList is having an updated visual identity! 
Rudolf, the design lead of phpList has worked for several months on the new phpList branding elements and has prepared this detailed blogpost describing every element: https://www.phplist.org/introducing-phplists-updated-brand/
Additionally, there is a very detailed document containing the new Brand Guidelines. You can check it here.
The new phpList brand has already started to roll out to the phpListproperties, and very soon you’ll see it applied to phpList.com.
Mariana