VNC: Connecting on a non-standard port

Did you ever notice how the colon in a URL is used to separate the hostname from the port number? With VNC, the colon is used to indicate the display number, so that seemed kinda weird. To specify the port number, we have to use a double-colon... VNC uses the single-colon prefix for display number and a double-colon prefix for port number. That surely is a departure from standards :-(