I use the Jira Announcement Banner (under Look and Feel) along with a different colour scheme to differentiate Test from Prod for our users.
The string I have in Jira is as follows:
<div class="global-warning" width="100%" align="center" <H1> <font color=#990000> JIRA2 (TEST)</div> </font> </H1>
Would someone please advise where/how I do the equivalent in Confluence? (I am running 4.1.6).