Is this a positive opk?

This is my first time using opks! I'm on cd17 now and testing since cd10. From cd10-13 there was only the control line. Starting cd14 a faint second line started to show and would get darker in the evening when I would test. This is my am test and it's the darkest I've had. To me it looks as dark as the control line to but my husband says it's slightly a bit more faint. Thoughts?