What do you think? I'm confused

So this test is obviously super dry. I took it yesterday and saw a faint pink line. Super faint. I thought it was just an indent or evap (because why would it be so light) but when I looked at it today the line is obviously darker and is purple which is the same as the control line. Again I know the test is dry, I'm wondering if that line would have color if it was just an evap or indent.

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