Positive OPK?

Ashley • Married to the love of my life! Baby Jack 1/2/16! Baby Brody 8/26/18!💙💙
Gah I don't want to sound dumb this is my first time using OPK's I started Sunday and today this is the darkest yet I'm wondering if it's positive or not? I just took this tonight. I don't want to miss any potential chances! Please help!