Customizer custom colors for Gutenberg color palette

gistfile1.txt

// Example of custom color defined in the Customizer

	$wp_customize->add_setting('primary_color', array(
		'default'             => '99CC00',
		'sanitize_callback'   => 'sanitize_hex_color',
		'capability'          => 'edit_theme_options',
		'type'                => 'theme_mod',
		'transport'           => 'refresh', 
	));
	$wp_customize->add_control( new WP_Customize_Color_control($wp_customize, 'primary_color_ctrl', array(
		'label'      => __('Primary color', 'your-textdomain'),
		'section'    => 'colors',
		'settings'   => 'primary_color',
	)));


// Gutenberg Custom color palette

	add_theme_support( 'editor-color-palette', array(
	    array(
	        'name' => esc_html__( 'Primary color', 'your-textdomain' ),
	        'slug' => 'primary-color',
	        'color' => get_theme_mod('primary_color', '#99CC00'),
	    ),
	    array(
	        'name' => esc_html__( 'Secondary color', 'your-textdomain' ),
	        'slug' => 'secondary-color',
	        'color' => get_theme_mod('secondary_color', '#606060'),
	    ),
	));