I recently needed to modify the stock Bootstrap CSS so that the Navbar had a light colour, #fafafb .
I added the following to static/css/web2py-bootstrap3.css . I just thought that I would share it here in case is useful for others.
.navbar-default{
background-color:#fafafb;
border-color:#fafafb;
}
.navbar-inner {
background-color:#fafafb;
border-color:#fafafb;
background-repeat: no-repeat;
filter: none;
}
.navbar .nav > li > a {
color: #3e3f3a;
}
.navbar .nav > li > a:active, .navbar .nav > li > a:hover {
color: #808285;
}