I have seen the older posts in the Community related to default green color change. I am able the change the green color to any other color through VB Macro but that is reflecting in the qvw file only(in the desktop) not in the Server/ webpage. Through these link " http://community.qlik.com/thread/19177" and "http://www.qlikfix.com/2012/05/18/any-colour-as-long-as-its-green/" I was able to know that for thsi I need to write the CSS code.
Now my question is where to I place my CSS code file to see the change in the color in the Server??