Customizer Registerer

new.php

<?php
use ClassName;

$panels = [
    'general_settings' => [
        'priority'    => 10,
        'title'       => __('General Settings', 'label'),
        'description' => __('General settings for this site', 'label'),
        'sections' => [
            'general_colors' => [
                'title'       => __('Colors'),
                'description' => __('Overall site colors'),
                'panel'       => 'general',
                'priority'    => 160,
                'capability'  => 'edit_theme_options',
                'theme_supports' => '',
                'fields'      => [
                    'brand_primary' => [
                        'label' => __('Brand Primary', 'label'),
                        'priority'  => 10,
                        'type'      => 'color',
                        'default'   => '#20c1fc',
                        'variables' => [
                            [
                                'name' => 'brand-primary',
                            ]
                        ],
                    ],
                ],
            ],
        ],
    ],
];

ClassName::registerPanels($panels);

old.php

<?php
use Kirki;

/**
 * General Settings
 *
 * @type: panel
 */
Kirki::add_panel('general', [
    'priority'    => 10,
    'title'       => __('General Settings', 'label'),
    'description' => __('Settings for this site', 'label'),
]);

/**
 * Colors
 *
 * @type: section
 */
Kirki::add_section('general_colors', [
    'title'      => __('Colors'),
    'priority'   => 160,
    'panel'      => 'general',
    'capability' => 'edit_theme_options',
]);

/**
 * Brand Primary Color
 *
 * @type field
 * @variable $brand-primary
 */
Kirki::add_field('label_color_brand_primary', [
    'settings'  => 'label_color_brand_primary',
    'label'     => __('Brand Primary', 'label'),
    'section'   => 'general_colors',
    'priority'  => 10,
    'type'      => 'color',
    'default'   => '#20c1fc',
    'variables' => [
        [
            'name' => 'brand-primary',
        ]
    ],
]);