How accurate is a blue dye test when you're 5 days late on your period??

I went to go buy walmarts 88 cent test with the pink dye. Well, my luck-they were sold out. So I just went for the next cheapest, being the equate brand test. I didn't notice it is a blue dye, til I got home. I've heard a lot of inaccurate reads from Blue dye, so now I'm worried I wasted money on this test, if it is invalid or inaccurate.