更改网格extjs3中的记录边框颜色

I have a grid that i'm using to display records from a table in my database. In this table i have a field called "STATUS" that has values either 'ON' or 'OFF'. What i'm trying to do is give the record a border-color green in the grid if the value is ON and red border-color if the value is OFF. I tried everything such as the getRowClass method while changing the CSS in the extjs-all.css . However i'm not being successful. I really appreciate some help.I have a grid that i'm using to display records