what is this?

ok ladies, so this morning around 9am, i took this test with FMU. Within the time frame, i came back and looked at it in the mist of getting ready, about 5 minutes after i did the test, and i saw this very slim line, i didn't think much of it and went to work, came home and the same line is still there, no difference, I know it's dry because i am confused and just now taking a picture of it, but I did see the same line within the time frame. I am confused, is this evap line or what? Ive seen a lot of girls post on here with the same line on the same test and ended up being pregnant any ideas? It has color