Blue, Red and Green Walnut https://www.nutcracker-factory.com/product/blue-red-green-walnut-man/blue-red-and-green-walnut.html "Blue, Red, and Green Walnut" does not correspond to any recognized types of walnut wood in the field of woodworking or botany. It's possible that these terms are being used in a creative or imaginative way, but they don't represent actual wood species or wood colors.