Unable to send emails due to color contrast

I have the same issue and Shopify tech support is escalating the issue. I have a black background with a white “Unsubscribe” link - even styled the link with x-large font. In other words, I have met the contrast and font size criteria but the error still persists. Even the Shopify tech support rep said that the contrast was more than fine. The biggest problem I have with all of this is why is Shopify sticking their noses into the content of OUR marketing emails - is Shopify the ones who violate some sort of Unsubscribe email rules? I thought it was we vendors who either comply or do not comply with the CAN-SPAM Act, not Shopify for individual stores. If Shopify legally has to render this error, then they need to provide an easy pathway for store owner compliance. This is very frustrating!