In Magento 2 Google Shopping Feed admin can easily link attributes of the Google Merchant Account to attributes of Magento store. Configuration of Magento 2 Google Shopping Feed is simple, and attributes like product ID, title, brand, color, GTIN, MPN, etc, can be added. If any required attribute is not mapped, then the product will not be exported. This ensures that all data is synced correctly.

Map Magento 2 attributes to Google Shopping fields in your feed settings then regenerate the feed.

Use Magento 2 admin or a feed extension to map product attributes (like color,) to Google Shopping fields under the feed settings.