Highlight Block Editor Links - Style the links in block editor to make them easy to find - while fixing broken links. https://www.damiencarbery.com/2025/09/highlight-block-editor-links/

style-block-editor-links.css

.editor-styles-wrapper  .wp-block-paragraph a[href^="https://eur04.safelinks.protection.outlook.com"]
{ background-color: black; color: white; }

style-block-editor-links.php

<?php
/*
Plugin Name: Highlight Block Editor Links
Plugin URI: https://www.damiencarbery.com/2025/09/highlight-block-editor-links/
Description: Style the links in block editor to make them easy to find - while fixing broken links.
Author: Damien Carbery
Version: 0.1.20250905
*/


defined( 'ABSPATH' ) || exit;


add_action( 'admin_init', 'hbel_add_editor_style' );
function hbel_add_editor_style() {
	add_editor_style( plugin_dir_url( __FILE__ ) . 'style-block-editor-links.css' );
}