Gets the theme color palette from within a component in the editor (view the console for the palette).

jt-get-theme-colors.js

import { registerPlugin } from '@wordpress/plugins';
import { useSetting } from '@wordpress/block-editor';

// Just creating a simple component so that we can use hooks.
registerPlugin( 'jt-log-theme-colors', {
	render: () => {
		// Use `useSettings()` in WP 6.5.
		const palette = useSetting( 'color.palette.theme' );

		// View the console to see colors.
		// This may be `undefined` when first loading, so you may need
		// to do a `undefined !== palette` check in some scenarios.
		console.log( palette );
	}
} );