My Custom WP Customize

<?php
function roots_customize_register( $wp_customize ) {

    $wp_customize->add_section( 'roots_theme_section_nav' , array(
        'title'      => __('Navigation Colors','roots'),
    ) );

    $wp_customize->add_setting( 'roots_theme_options[nav_bg]' , array(
        'default'     => '#FAFAFA',
    ) );

    $wp_customize->add_control( new WP_Customize_Color_Control( $wp_customize, 'nav_bg', array(
        'label'        => __( 'Background color', 'roots' ),
        'section'    => 'roots_theme_section_nav',
        'settings'   => 'roots_theme_options[nav_bg]',
    ) ) );

}

function roots_customize_css() {
    ?>
    <style type="text/css">
     .navbar-inner { background-color:<?php echo get_theme_mod('roots_theme_options[nav_bg]'); ?>; }
    </style>
    <?php
}

add_action( 'customize_register', 'roots_customize_register' );
add_action( 'wp_head', 'roots_customize_css');