Forms Tab Widget - Tab Color / Text editing

I'd like to change the background color of the tabs in my Forms Tab Widget to #21a6cf , the TEXT color to WHITE and BOLD and its FONT to "OPEN SANS"

What's the CSS code for this? (Unable to find identifiers for each tab)

Thanks!

Use this CSS codes.

.tabs-list.default li {

    color: #ffffff;

    background: #21a6cf;

}    

.liContent {

    font-family: Open Sans, sans-serif;

}

.tabs-list.default li .liBefore {

    border-bottom: 28px solid #21a6cf;

}    

.tabs-list.default li .liAfter {

    border-bottom: 28px solid #21a6cf;

}

.tabs-list.default li.current {

    background: #117fa0 !important;

}

.tabs-list.default li.current .liAfter, .tabs-list.default li.current .liBefore {

    border-bottom: 28px solid #117fa0 !important;

} 

Result:

I've bold the current/active tab background color so you can change it.

Thanks Elton, this is Awesome!! You're the best!!