The logo was chosen at the inaugural meeting in April 2015. It is supposed to work on white and black background. A vector graphics version in SVG format is available, please ask.
The SwissPUG Logo is a copyrighted design. Markus Wanner is the original creator and provided the association an exclusive and unlimited right to use, modify and redistribute it.
The association may well allow others to use it. Please see PostgreSQL's trademark policy for a rough guide on terms and conditions that may apply.