Control Panel > Style & Colors > Custom StyleSheet (under Advanced Style Settings in the right side panel)
html, body, div, p, td, form, img, h1, h2, h3, h4, h5, h6, input, select {font-family: Verdana,Tahoma,Segoe,sans-serif;font-size: 9pt;}body {background-color: #222; color:#000;}form {padding: 3px;border: none;}img { border: none; }hr { color: #2d2d2d; } table { color: #2f17000;font-family: Verdana, Tahoma,Segoe,sans-serif;font-size: 9pt; }.MessageAuthorLinkCell1{width: 135px;}.MessageAuthorInfoCell1{text-align: center;width: 135px;vertical-align: top;}.ContentBoxTitle {color: #2f17000;margin-top: 0px;padding-top: 0px;}.StateBar {background-color: transparent; color: #dddddd; text-align: center;padding: 5px;}.TabBar {background-color: transparent; padding: 0px; margin:auto; width:700px; }.SelectedTab {background-color: #2d2d2d;color: #daca92;border: solid 1px #2d2d2d;border-color: #2d2d2d;text-align: center;padding: 2px;}.UnSelectedTab {background-color: #000000;color: #daca92;border: solid 1px #2d2d2d;text-align: center;cursor: pointer;padding: 2px;}.UnSelectedTabMo {background-color: #2d2d2d;color: #daca92;border: solid 1px #2d2d2d;border-color: #2d2d2d;cursor: pointer;text-align: center;padding: 2px;}.MoGridRow { text-align: left; }.AltGridRow{background-color: #222222;color: #daca92;}.NormGridRow{background-color: #111111;color: #daca92;}.ContentBox {background-color: #000000;border: solid 1px #2d2d2d;}.ContentBoxTitle {padding: 5px;background-color: #2d2d2d;color: #daca92;}.ContentBoxBody {background-color: #000000;color: #daca92;padding: 5px;}.ContentTable { background-color: #000000;color: #daca92;font-family: Verdana,Tahoma,Segoe,sans-serif;font-size: 9pt;}a:active {color: #c8c8e8; text-decoration: none;}a:link {color: #c8c8e8; text-decoration: none;}a:hover {color: #c8c8e8; text-decoration: underline;}a:visited {color: #c8c8e8; text-decoration: none;}.CenterContentZone {padding: 0px 30px;}.CenterContentZone .ContentBox {background-color: transparent; border: 0px;}.CenterContentZone .ContentBoxTitle {padding: 5px;background-color: transparent; color: #2f1700; font-weight:bold;}.CenterContentZone .ContentBoxBody {background-color: transparent; color: #2f1700; padding: 5px; border: #000000 0px solid; border-bottom-width:1px;}.CenterContentZone .ContentTable { background-color: transparent; color: #2f1700;font-family: Verdana,Tahoma,Segoe,sans-serif; font-size: 9pt;}.CenterContentZone .ForumCategoryHeader {background-color: #000000; color: #daca92; border: #2d2d2d 1px solid; padding: 0px 5px; margin: 1px;}.CenterContentZone .MoGridRow {background: #cccccc; text-align: left; }.CenterContentZone .AltGridRow {background: transparent; color: #2f1700;}.CenterContentZone .NormGridRow {background: transparent; color: #2f1700;}.CenterContentZone a:active {color: #3d1f1f; text-decoration: none;}.CenterContentZone a:link {color: #2f1700; text-decoration: none;}.CenterContentZone a:hover {color: #ffffff; text-decoration: none;}.CenterContentZone a:visited {color: #9d4f4f; text-decoration: none;}#ctl00_ContentPlaceHolder1_ContentRow {background: url(http://i201.photobucket.com/albums/aa236/Mottie1/testsite/styles/scrolltop-2.gif) center top no-repeat;}#ctl00_ContentPlaceHolder1_ContentTable {background: url(http://i201.photobucket.com/albums/aa236/Mottie1/testsite/styles/scrollmiddle-1.gif) center top repeat-y; }.FooterArea {background: url(http://i201.photobucket.com/albums/aa236/Mottie1/testsite/styles/scrollbottom-1.gif) center top no-repeat; height: 176px;}