Lost focus color...please please please

When lost focus on gird i want the color of selected row is none. I use
ex
obj.getRowTemplate(3).setStyle("background","#B3F9D7");
It ok but when i lick on that row (row 3) the selected row is not have color

If i set in css:
ex
.aw-rows-selected {background: green!important}
then
obj.getRowTemplate(3).setStyle("background","#B3F9D7"); not effect

Please help me. I just want when lost focus, the select row is not have color...please please please