DougBreaux 0100002GMN Visits (1969)
As a response to a StackOverflow question, Chan
To me, this seems a very wise thing to do for anyone who manages multiple environments. (We've taken to actually styling our Development and Test end-user websites in a similar manner so people don't accidentally perform testing in the wrong environment.)
WebSphere's built-in solution
Note also another useful answer there that the WAS console does have a built-in mechanism for adding a custom text string to the banner. You can set this custom string in the System Administration > Console Identity > Custom identity string field.
Something more drastic
But the Stylish approach allows you to make some more obvious, drastic visual difference.
This script styles the #ibm-banner-main element by adding a background color to it. The effect looks like this:
(Where the "*CUST*" string is the aforementioned "Custom identity string".)
Copied from my StackOverflow answer, the content of the Stylish script would be:
Replace 'your-server' and potentially the 'https' and port, as appropriate.
You can list multiple
Which element to style
The way I determined which ID or class to style was using my browser's Development Tools "inspect this element". Using this investigative technique, other elements of the page could be discovered to style instead or in addition.
DougBreaux 0100002GMN Visits (5629)
In case the folks over at the Web 2.0 and Mobile Development Community don't get around to it, here's the video replay of the Enterprise Development Options for Mobile Devices Webinar from last week. Just watched it myself, and it's a good overview.