Why does my black eyeshadow always turn blue?

Every time I put on black eyeshadow it always turns out to be blue.


Does anyone know why?


THXx!Why does my black eyeshadow always turn blue?
It is probably not black, but really just a very dark shade of blue so when you put it on, you see the true color.Why does my black eyeshadow always turn blue?
there are two undertones when a black eyeshadow/ liner/ watever is made:


blue and purple.





the blue based black is less intense and more likely to fade and turn into its base color.





purple based black is all around a deeper darker black and less likely to turn into its base color.





like another person who answered; ';Carbon'; from MAC is pretty great i can assume due to its high popularity.
It may be the quality of the shadow. Try Carbon by Mac which appears to be very popular. Revlon may have one.
It's probably a navy blue but looks black so when you put it on your lids it's blue.
Mold?