Registering colors for use with Guetenberg

functions.php

/**
 * Set the theme colors
 */
add_action( 'after_setup_theme', 'prefix_register_colors' );
function prefix_register_colors() {
	add_theme_support(
		'editor-color-palette', array(
			array(
				'name'  => esc_html__( 'Black', 'prefix_textdomain' ),
				'slug' => 'black',
				'color' => '#333',
			),
			array(
				'name'  => esc_html__( 'Blue', 'prefix_textdomain' ),
				'slug' => 'blue',
				'color' => '#669BC9',
			),
			array(
				'name'  => esc_html__( 'Light', 'prefix_textdomain' ),
				'slug' => 'light',
				'color' => '#eef2f5',
			),
			array(
				'name'  => esc_html__( 'Yellow', 'prefix_textdomain' ),
				'slug' => 'yellow',
				'color' => '#c3a144',
			),
		)
	);
}