blue dye faint lines

Bridget
AF was due 4/9. I took this test at 1:35am. I've heard blue dye tests are the best and I had what looked like vvvvfl on two other tests. This looks darker than the other two. 
Top on was take the day before my missed period (8th). The second one was taken the day after my missed (10th). The third was taken on the 12th. The bottom one was taken this morning, the 14th.