Can an indent show up the same as a positive result on a Inverted photo

So I took a test and I can't tell if the line has pink in it or if it's an indent line... whyyy so complicated. It is a FRER no lines before test... you know how sometimes you can see them before you take the test...I looked and nothing after I take it a line shows up but I cant see if it has color or not. So of course ... I know.. dont take it out the case... stupid me... I took it out the case snapped a photo and I swear I see the line on a negative filter... but idk if indents would come up on the negative as a ( glow line )

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