Dynamically change Twitter Bootstrap Progress Bar color with JQuery

progressbar.html

<div id="progressbar" 
     class="progress-bar progress-bar-custom 
            progress-bar-striped-custom"     
     role="progressbar"
     aria-valuenow="70" aria-valuemin="0"
     aria-valuemax="100" style="width: 70%;">
  Progress Bar Text
</div>

progressbar.js

var progressBarColor;

var someValueToCheck = 5;

if(someValueToCheck >= 10) progressBarColor = "#A52A2A";
else if(someValueToCheck >=5) progressBarColor = "#00FFFF";
else progressBarColor = "#00008B";

$("#progressbar").css('background-color', progressBarColor);