For sure it happened to you as well that you changed data in the wrong system or client. This is not just embarrassing, but can also have serious consequences. 

Many users of SAP ECC or S/4HANA are happy to have the possibility to set a specific color according to the system or client they are logged in. While it is obvious in the signature theme how to do it, it is quite hidden in the Belize or Quartz theme.

Step by step description of what to do

How to do it:
1. In SAP Logon go to the burger menu and choose Options.
2. In Options choose Visual Design > Color Settings and set color per System
3. Go to Visual Design > Theme Settings and make sure, that "Move Main menu to 'More' Button" is set.
4. Login to system and client, who's color you like to set.
5. Go to More > SAPGUI Settings and Actions > Options and Visual Design > Color Settings
6. Set color for client or system text here ...