A value in an array as a color?

1

forgive me if i couldn’t explain it on title.
i have an assignment and i’m trying to execute it in flash.
i use laco tween. i have an xml file and it has captions like;

<student>
  <name>arif amele</name>
  <rbir>0x170375</rbir>
  <riki>0x506545</riki>
</student>

<student>
 <name>galip sevilmez</name>
 <rbir>0x004E2</rbir>
 <riki>0x763456</riki>
 </student>

then i pushed each of these values into different arrays.
these rbir and riki are rgb color codes but i cant use them still.
i can write down the “name” captions into an emptyMovieClip using createTextField.
but when i try;

for(i=0;i<ogr.length;i++) {
  _root["ad"+i].onRollOver = function(){
    _root.kare.colorTo(rbir*,1);
    _root.kare2.colorTo(riki*,1);
  }
}

it doesn’t work.
what is wrong?