Trick to remember which instance I am working with
You can colour code the status bar in SQL Server Management Studio
Easiest if you use the Registered Servers or Central Management Servers feature and then allocate colours at a group level i.e. Dev (Green) / Test (Yellow) / Prod (Red)
https://documentation.red-gate.com/sp/ssms-tab-management/working-with-ssms-tab-management-quick-ref
btw You may need to spell it color to get a match