[Support request] colours palete

Hello,

I use a code to set the colours palette in GP and GBlocks, but it seems not working in WP Show Post…

which code should I use to set colours palette in WP Show Post?
https://share.getcloudapp.com/JruDv7kL

this is my actual code:

add_action( 'after_setup_theme', function() {
    add_theme_support( 'editor-color-palette', array(
        array(
            'name'  => __( 'Rojo Pri' ),
            'slug'  => 'rojo_main',
            'color' => '#ea2121',
        ),
        array(
            'name'  => __( 'Rojo Claro' ),
            'slug'  => 'rojo_ligth',
            'color' => '#f94141',
        ),
        array(
            'name'  => __( 'Rojo Oscuro' ),
            'slug'  => 'rojo_oscuro',
            'color' => '#bf0202',
        ),
        array(
            'name'  => __( 'Verde' ),
            'slug'  => 'verde',
            'color' => '#bf0202',
        ),
        array(
            'name'  => __( 'GRIS' ),
            'slug'  => 'gris',
            'color' => '#3f3f3f',
        ),
        array(
            'name'  => __( 'Gris Claro' ),
            'slug'  => 'gris_light',
            'color' => '#b7b6b5',
        ),
    ) );
} );

/* 8 colours */
add_filter( 'generate_default_color_palettes', 'tu_custom_color_palettes' );
function tu_custom_color_palettes( $palettes ) {
	$palettes = array(
		'#000000',
		'#FFFFFF',
		'#ea2121',
		'#bf0202',
		'#bf0202',
		'#1e72bd',
		'#3f3f3f',
		'#b7b6b5',
	);
	
	return $palettes;
}

thanks