Still have breast milk that's dark green almost black in color. It does not leak unless I squeeze. I never breast fed and my child is 8yrs old. Is it normal to still produce milk and is the darkness of color normal?

No, an no. Your child is eight years old, your milk should have been dried up long ago especially if you never breast fed. The color being what it is would be concerning to me, you need to make an appointment with your doctor soon and have that looked at.