No more wrong tab
Flagging the environment
Two open tabs, two identical back offices: that is how a test order ends up on production, or a stock gets emptied on the real shop. The module tints the top bar of the back office in the shade you choose. The text colour is recomputed automatically so it stays readable, whatever shade you pick.
On the public site, a fixed badge can sit in the corner of your choice. It follows the scroll, blocks no clicks, and carries the wording you type — useful when several copies coexist: UAT, CLIENT DEMO, STAGING SITE.
A stylesheet is written to disk. Colours go into a CSS file inside the module rather than being injected on every page: the display cost is nil. If the folder is not writable, the module tells you instead of failing quietly.