To apply a custom link to the logo in your theme, you can use the apply_filters( 'kalium_logo_url', home_url() ) filter. Here's how you can modify this to add your custom URL:

Steps:

1. Open your theme's functions.php file: This is where you'll add the custom filter.
2. Add the following code:

function custom_kalium_logo_url( $url ) {
    // Replace with your custom link
    return 'https://example.com';
}

add_filter( 'kalium_logo_url', 'custom_kalium_logo_url' );