I am using OpenERP - 7, and I have created couple to module and they are working fine.

But I am having difficulty in changing the buttons color from Red to any other color through modules. This

help.openerp.com/question/2615/how-to-remove-manage-databases/?answer=2631#post-id-2631

post helped me in understanding how to create modules. I have also created a module to change the CSS of certain portion, But I don't seem to understand how to create a module to modify button's color.