What does a positive OPK look like?

So the other day I picked up the Clearblue easy ovulation tests. I am really regretting not getting the digital one. The instructions said that based on my 26 day cycle that I should have started testing on cycle day 9 but I didn't start till cycle day 11. I have yet to get any positive OPKs yet both my apps say I'm supposed to ovulate today. Do you think I could have missed the peak day for testing, or do you think I should keep testing to see if the line darkens? The top test is cycle day 11, the second is 12 and the bottom is 13. Would 11 be considered positive?