Tutorial: Menukar Background Warna Bagi Shoutbox Or Shoutmix Hide And Show

Assalamualaikum.

meh azza ajar korang macam mana nak tukar background warna bagi shoutbox or shoutmix hide and show. neh coding yg azza amik dari cikgu nesc :)

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.gbtab{
height:100px;
width:30px;
float:left;
cursor:pointer;
background:url('http://i1023.photobucket.com/albums/af355/abuinayat/Tab.png') no-repeat;
}
.gbcontent{
float:left;
border:2px solid #666666;
background:#F5F5F5;
padding:10px;
}
</style>

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warna biru tu url background yg korang nak masukkan
warna pink gelap tu kod warna bagi luaran chatbox
warna hijau tu warna dalaman chatbox.

GUDLUCK :D