OPK confusion

Richelle • Mommy of 2 amazing little minions 💙💙
I took a clear blue digital opk and got this result....  The lines are obviously not the same color and they looked the same as yesterday but I didn't get a smiley.  Does anyone know which line on a digi is the test line?  I'll probably retest tonight to see if I still have a smiley 😒