Coloring Background Product Categories On PDF

Hello everyone, I had previously asked in another topic how I could color the product names according to their categories in the pdf invoice, and I was able to do this thanks to the following snippet provided by the support team.

/**
 * WooCommerce PDF Invoices & Packing Slips:
 * Set a custom color to product names based on its category
 */
add_filter( 'wpo_wcpdf_order_items_data', function( $data_list, $order, $document_type ) {	
	foreach ( $data_list as $item_id => $item ) {
		if ( $product = $item['product'] ) {
			$id = $product->get_parent_id() ? $product->get_parent_id() : $product->get_id();
			$terms = get_the_terms( $id, 'product_cat' );
			foreach( $terms as $term ){
				$color = '';
				switch( $term->slug ) {
					case 'accessories':
						$color = 'red'; // color name or hex code (e.g. #673ab7)
						break;
					case 'clothing':
						$color = 'blue';
						break;
				}
				if ( ! empty( $color ) ) {
					$data_list[$item_id]['name'] = sprintf( '<span style="color:' . $color . '">%s</span>', $item['name']);
					break;
				}
			}
		}
	}
	return $data_list;
}, 10, 3 );

This snippet works great, there is no problem, but we also want to change the background color of some category groups (for that row only).

I tried to do it myself by playing with the above snippet, but I couldn’t. I wonder how can I change the background colors, can you help?

Thank you, have a nice day.