Yes it can be I guess just got back from the doctors and am not pregnant so there is a chance that the evaporation line can be dark blue.
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Evaporation lines are typically colorless or very faint in appearance. If you see a dark blue line on a pregnancy test, it is more likely to be a positive result indicating the presence of hCG hormone, rather than an evaporation line.
dark nipples" and a "dark line" occurs during preganancy
Evaporation depends on temperature. During the night evaporation is lowered.
yes
Sapphire is a dark blue colored gemstone. It is a precious gemstone that belongs to the corundum family and is known for its deep blue hue.
You think probable to the water evaporation.