are these positive opk's? all taken tonight

Paige • 31.Married 9/7/15. Due with #3 4/5/21 💕
I decided to start testing tonight on CD 16. This is our first month trying after a miscarriage at 18 weeks last May. Just looking to see is these are dark enough to be considered positive? I can't remember if the test line is supposed to be DARKER and not just the same