Clear blue tests

Maddie

So I took this test and I couldn’t see anything straight away, so I put it in the cupboard. Came back to it and boom seen this....

There is no other blue anywhere else but where the lines are and it runs from top to bottom.

Could this be a positive ?? Vvf one ??

Also what happens if I take a pink dye test and nothing shows up? Could this be a false positive ?