Hi Syahir,
Thanks for this, I was wondering how to get rid of the black. I tried the code below, which works pretty good, but if I do it (on http://www.fairview.edu.my) the background of Welcome and the other titles is still black. I would love to change only what is black now to #012F50. I like the light colour on top. Thanks.
#top-bar, #nav {
background: -moz-linear-gradient(left top, #012F50, #6E7997);
background: -webkit-gradient(linear, left top, right bottom, from(#012F50), to(#6E7997));
background: linear-gradient(left top, #012F50, #6E7997);
-pie-background: linear-gradient(left top, #012F50, #6E7997);
}