[WordPress] A gist that's used in a post for showing to give those without source control access to make changes to the stylesheet.

1-acme-plugin-styles.php

<?php

class Acme_Plugin {

	public function __construct() {
		add_action( 'admin_enqueue_scripts', array( $this, 'add_styles' ) );
	}
	
	public function add_styles() {
	
		wp_enqueue_style(
			'acme-admin-custom',
			plugins_url( ACME_PLUGIN_NAME . '/admin/assets/css/acme-custom.css' ),
			array(),
			ACME_VERSION,
			'all'
		);
	
	}

}