How to Add Custom CSS to the Media Thickbox?

In WordPress 3.5, this hook works for me:

add_action( 'print_media_templates', 'wpse_75746_print_style_35' );

function wpse_75746_print_style_35()
{
    ?>
    <style>
        .media-modal-content, .media-sidebar {
            background: #FFF2D4 !important;
        }   
    </style>
    <?php
}

In 3.4.2, this is the one:

add_action( 'admin_print_styles-media-upload-popup', 'wpse_75746_print_style_342' );

function wpse_75746_print_style_342()
{
    ?>
    <style>
        #media-upload {
            background: #FFF2D4 !important;
        }
    </style>
    <?php
}