Как изменить цвет таблицы важных тем?

<td class="alt1" id="td_threadtitle_$thread[realthreadid]" title="$thread[preview]">

<td class="<if condition="$show['sticky']">sticky<else /><if condition="$show['moderated']">moderated<else /><if condition="$show['subscribed']">subscribed<else /><if condition="$thread['pollid']">poll<else />alt1</if></if></if></if>" id="td_threadtitle_$thread[realthreadid]" title="$thread[preview]">

<td class="alt1">

<td class="deleted">

<td class="alt1">

<td class="alt2"

<td class="announcement">

 .announcement {
background-color: #f9e0fb;
color: #4D528C;
border-left: 1px solid #FFFFFF;
border-top: 1px solid #FFFFFF;
}
.sticky {
background-color: #fefdf0;
color: #4D528C;
border-left: 1px solid #FFFFFF;
border-top: 1px solid #FFFFFF;
}
.poll {
background-color: #bcdcf2;
color: #4D528C;
border-left: 1px solid #FFFFFF;
border-top: 1px solid #FFFFFF;
}
.moderated {
background-color: #f9e0fb;
color: #4D528C;
border-left: 1px solid #FFFFFF;
border-top: 1px solid #FFFFFF;
}
.subscribed {
background-color: #dcf2d4;
color: #4D528C;
border-left: 1px solid #FFFFFF;
border-top: 1px solid #FFFFFF;
}
.deleted {
background-color: #ffc1de;
color: #4D528C;
border-left: 1px solid #FFFFFF;
border-top: 1px solid #FFFFFF;
}