Customize wordpress example

customizer.php

function q_customize_register( $wp_customize ){
    
    $wp_customize->add_section('themename_color_scheme', array(
        'title'    => __('q Shortcodes', 'themename'),
        'description' => '',
        'priority' => 100,
    ));
 

    $wp_customize->add_setting('themename_theme_options[link_color]', array(
        'default'           => '#000',
        'sanitize_callback' => 'sanitize_hex_color',
        'capability'        => 'edit_theme_options',
        'type'           => 'option',
 
    ));
 
    $wp_customize->add_control( new WP_Customize_Color_Control($wp_customize, 'link_color', array(
        'label'    => __('Link Color', 'themename'),
        'section'  => 'themename_color_scheme',
        'settings' => 'themename_theme_options[link_color]',
    )));
 
}
add_action( 'customize_register', 'q_customize_register' );