[HM666]

You want it for both of them? What exactly are you trying to make red? A menu tab?

For both:

.formcontrols .blockrow .dbtech_shouts .dbtech_vbshout_tabs.alt {
    background-color:red;
}

.formcontrols .blockrow .dbtech_shouts .dbtech_vbshout_tabs.alt2 {
    background:red;

But keep in mind that this may control other areas of your skin, I'm not sure since its a dbtech setting. Also make sure that you save the original code first somewhere in case this does not produce the result you want and looks bad. Its hard for me to see what it would change without actually seeing a link to your site and looking at the css.