Is this a evaporation line

[Emilyja23]

I took a test a came back to it later after I saw it was negative but I didn’t really really check it I just glanced. Then checking it after I noticed blue lines on the one part of the test.

I think if the line didn’t come up in the allotted time then yes probably an evaporation. These tests are notorious for this, there’s a post every few days about them. You’re best with ones with a pink dye such as boots first response or some cheapies from Amazon which can detect low amounts of hcg.