Within Twitter Bootstrap there is a selection of buttons that one can choose from (as seen here: http://twitter.github.com/bootstrap/components.html). For our project, we opted to use a yellow color that was not included in the default set. A simple matter to simply create a new css class which included the colors I wanted. However, when the button is pressed in, the background color returns to the default grey background color instead of a like-background color as is seen with the other buttons on click. Did I miss something during the creation of the button?
example of issue (taken in FF):

You need to specify your new color with the :active pseudo selector. When you press a button it gets “active” and the :active selector kicks into play. When you release the mouse button the element stops being active and the element style reverts back to normal. Sort of like the :hover pseudo selector, when you’re hovering the pointer over something.