Ovulation tests?

Katy • 25 R.i.p my sweet baby 01-22-16👼🏼 Mommy to Barrett 03/13/17💙 TTC baby #2 YouTube channel Katy Goodwin

So I took these this morning and I had a full blown positive yesterday on bother (last month they were positive for two days) this morning they’re not both positive. Only the blue one is. What does that mean..

Also when you are actually ovulating do you get a positive on the test or just a day before you ovulate?? Sorry I’m not really caught up on the ovulation tests haha