Figure: Bad example - the version number is too large, too dark and too obvious
Figure: Good example - the text is small, barely visible and would only be noticeable if you're looking for it.
The best way to label the version is as follows:
When a team member creates a new version, they should change the minor (i.e. the number after the decimal point)
When the product owner affirms a new version, the major changes (i.e. the number before the decimal point)