In the the HTML output for the manual the version number in the navigation heading is very dim and hard to read.
I have added a custom css file to override the theme css styles. The custom css changes the colour of the version number to white. Back ported back to 19.11 versions of the manual. Commit: https://gitlab.com/koha-community/koha-manual/-/commit/26850c50fa4ca279ba2d38df8542976a57c2974c