On the blue, grey and black list are (presumably) unreasonable Conditions that you may not use. If you would use them, a consumer can indicate that he is not bound by the Conditions. Please note: these lists serve to protect the consumer and therefore only apply to consumer law. In addition to the ordinary consumer protection, the law on distance selling also applies to the online purchase of the consumer, which gives these consumers extra protection. All the more reason to use professionally drawn up General Terms and Conditions.