How to change SITE NAME in R12

Post Clone activity.

1. How to change SITE NAME.
2. How to change form Colour.

Means How to differentiate the PROD or TEST instance???

1. Login with Sysadmin or other user which user have System Administrator Responsibility.

Click on System Administrator>>>
Click on Profile>>>>
click on SYSTEM>>>

Open Profile window.
Find "SITE NAME" Profile option. Like below screen.

  Change SITE NAME what you want. Save it.
Logout or again login open any form its display what you changes below SITE NAME.

Here I am editing R12.1.3 PROD to R12.1.3 New TEST. Save it.

Next time its display for every one.