Creating a custom theme is a bit more complicated. You have to setup a subdomain called "mlinkconf.yourdomain.com".
Even if you use a subdomain like "short.yourdomain.com" as shortener the config subdomain is "mlinkconf.yourdomain.com". On this
domain Mlink will search for a file called "theme.css", which will be loaded if it exists and is not empty. There you can
overwrite the default CSS
. You can have a look at
for an example of a theme, where just the colors are modified, which is enough for most themes. If you overwrite other
styles they may become incompatible with future updates. Happy customizing!