If it's solid black of course it will stand out! I'll be contrary and say I don't think it depends on the colours that much. Try drawing on paper and mix a black and grey piece with something in colour. See what stands out.
It really just depends on the piece. A heavy black tattoo in the middle of colour will stand out, a colour tattoo in a black and grey area will pop. It just depends what you're looking at but it likely will look very similar to how it would look on paper. Get some charcoal and coloured pencils and see what happens.
If it's solid black of course it will stand out! I'll be contrary and say I don't think it depends on the colours that much. Try drawing on paper and mix a black and grey piece with something in colour. See what stands out.
It really just depends on the piece. A heavy black tattoo in the middle of colour will stand out, a colour tattoo in a black and grey area will pop. It just depends what you're looking at but it likely will look very similar to how it would look on paper. Get some charcoal and coloured pencils and see what happens.