# Remove Block Theme Styles From Classic Themes

> Stops classic (non-block) themes from loading the global styles, classic theme styles and duotone SVG filters that WordPress adds for block themes, saving inline CSS on every page.

- Type: PHP
- Runs: Frontend only
- Category: [Performance](https://wpide.com/library/category/performance/)
- Tags: css, classic-themes, cleanup
- Author: WPIDE Team
- Installs: 0
- Updated: 2026-10-28
- Page: https://wpide.com/library/perf-remove-global-styles-classic/

## Code

```php
add_action( 'wp_enqueue_scripts', function () {
    if ( wp_is_block_theme() ) {
        return;
    }

    wp_dequeue_style( 'global-styles' );
    wp_dequeue_style( 'classic-theme-styles' );
    wp_dequeue_style( 'core-block-supports-duotone' );
}, 100 );

add_action( 'init', function () {
    if ( function_exists( 'wp_is_block_theme' ) && ! wp_is_block_theme() ) {
        remove_action( 'wp_body_open', 'wp_global_styles_render_svg_filters' );
        remove_action( 'wp_footer', 'wp_enqueue_global_styles', 1 );
    }
} );
```

## Notes

Only runs on classic themes; check that buttons and colors set in the editor still look right after enabling it.

## How to use it

Install the free WPIDE plugin (https://wordpress.org/plugins/wpide/), find "Remove Block Theme Styles From Classic Themes" in its snippet library and add it in one click; or create a new PHP snippet in WPIDE (or any code snippets plugin) and paste the code above. More snippets: https://wpide.com/library/