Moto Z2 Play is available in 2 colors - Lunar Grey and Fine Gold.
Yes, but you have to buy a special mod for it.
Moto Z2 Play SAR value are as below:
SAR Value (Head): 1.455 WKg/1g
SAR Value (Body): 1.24 WKg/1g
Yes, Moto Z2 Play does have Corning Gorilla Glass protection.
No. Moto Z2 Play does not have HDMI port but you can use HDMI connector.