So you don't accidentally publish a full solution on your production environment, thinking you're on DEV. It could be taken a step forward, by changing Service Studio's menu color to the one of the Service Center it's connected to.
If logging into multiple ServiceCenters and EnterpriseManagers it would be useful to be able to assign DEV = Green banner, TST= Orange PRD=Red - just so you can immediately see if you are about to delete/takedown an application in PRD by accident!
Similar idea to different coloured terminal setups in other environments.
The original idea and latest feedback is from 2010, since then Service Center UI has evolved.
Does the current UI (below) of Service Center fulfill this idea?
The current UI allows us to differentiate the environments. Having different colors would make those differences more striking, but I think the general purpose of this idea was fulfilled.
Plus, setting Roles & Permissions (which were mentioned in the beginning of the thread) help in avoiding this error as well.