FItv_Powl_trip Colum Color

I am working on Webdynpro Component, FITV_POWL_TRIPS . I have to enhance the color of one Column in the Tab according to data coming.

Ex. I am checking Status Column.

If Status Column value is Approved, Color should be green.

If Not approved, Color - Red.

How to proceed for that ?

I know i have to change the Cell Design of that Column but I am not able to see where the fields and coming from and Where to write the logic for that ?

Access path for this application.

Go to SE80 -> Webdynpro Component -> FITV_POWL_TRIPS -> Test...

My Findings:

1.. The Tab Strib is calling from POWL_UI_COMP application.

2. The Table Control is from SALV_WD_TABLE

Any Inputs ?

Any one who have worked on Fitv_powl_trips Please Help .