8 dpo - which one is right?

Blue dye test line showed up before the 3 min mark and it has color to it, not grey. Pregmate seems to be negative. Is it that it’s too early to detect on the pregmate brand or is the blue dye test a false positive. I know they’re notorious for evaps and stuff like that but I didn’t look at it past the 3 min mark and the line is blue.