ok, I have this version of the Garmin map for more than one year but...
.. the colors of this new version are disappointing. While biking in the forrest one can hardly read the map because of the low contrast (light grey on green). After searching the Internet from A to Z and back I had all the possible applications to start modifying a Garmin map. Not on my Mac but on my virtual Windows machine. After a few nights working I am happy with the result.

The colors of the map are now similar to the previous version of the SwissTopo map for Garmin in either normal mode (see photo) or with the backlight on. Plus, I have removed a lot of text that I don’t need while on a bike ride.