If the content team decides that end punctuation rightfully belongs outside closing quotes, so be it. If your content is purposefully irreverent, specify the limits, if any, to the degree of irreverence allowed. The point is to decide on a shared approach to style, and to implement this approach in a consistent manner. Treat the institutions and players in your world with a dose of irreverence. Play with grammar and syntax.
Most pages combine content with functional, branding and navigation elements.
If the navigation scheme requires a specific color combination, document exactly which colors belong in which circumstances. The guidelines presented here represent the opinions and preferences of a small group of people within Sun who have created some web pages, and have looked at many more. We've drawn from our own observations, opinions and judgements about what makes web pages better or worse, as well as extrapolating from the existing body of usability and user interface design literature. It seemed only natural to collect and rigorously evaluate our principles for Web design.