I've used green-gray mats on thousands of pictures. Warm and cool variants of this useful color form the overall background tones of many paintings, possibly because flesh tones contain red; and red is the color wheel opposite, or complement, of green.
Below is a list of toll free 800 numbers for Amazon.com. Customer Service: 1-866-216-1072. Phone Menu Transcription: If you call the number above you will get the options below. Thank you for calling Amazon.com customer service, for quality assurance and training services your call maybe monitored or recorded.
Ultimately, amazon web services has a 24/7 phone number, but only for paying Enterprise level clients. You can see this in their premium support options here. As far part of the Amazon family of products, amazon web services falls under the umbrella of primarily automated support for customer service.