The bulk update request #5549 is pending approval.

remove implication black_and_grey (856) -> monochrome (400166)
create implication black_and_grey (856) -> greyscale (73177)

Reason: Why do we even have this tag?

Not an alias because black and grey already has aliases redirecting to it.

Maybe an alias would be better. Black and grey should be for images that have only black and one shade of grey (like how black and white is for images that have only black and white, with no extra shades), while greyscale is supposed to contain a scale of grays (which can include white and black). But looking at the tag, a good number include multiple shades of gray, making it the same as greyscale.

black_and_grey is for two-tone images, usually ones that use a single shade of grey for the base and black for the lineart, greyscale is for images with varying levels of white/grey/black to show more detailed shading.

watsit said:
Maybe an alias would be better. Black and grey should be for images that have only black and one shade of grey (like how black and white is for images that have only black and white, with no extra shades), while greyscale is supposed to contain a scale of grays (which can include white and black). But looking at the tag, a good number include multiple shades of gray, making it the same as greyscale.

I mean, black_and_grey's only got 600 posts, that doesn't sound like too bad of a cleanup.

watsit said:
Maybe an alias would be better. Black and grey should be for images that have only black and one shade of grey (like how black and white is for images that have only black and white, with no extra shades), while greyscale is supposed to contain a scale of grays (which can include white and black). But looking at the tag, a good number include multiple shades of gray, making it the same as greyscale.

Grey and white is aliased to greyscale, so I don’t see why black and grey wouldn’t be too. It’s more logical to me. Both contain grey and an other colorless shade.

dimoretpinel said:
Grey and white is aliased to greyscale, so I don’t see why black and grey wouldn’t be too. It’s more logical to me. Both contain grey and an other colorless shade.

Seems that alias was made a long time ago because a lot of people used it with many shades of grey, making it the same as greyscale rather than one shade of grey and white as intended. If black_and_grey has the same issue, an alias would also be appropriate, though sipothac suggests it might be a manageable cleanup project. Either way, an implication doesn't seem appropriate; it should either be an alias because it's used the same as greyscale, or it needs a cleanup to be only black and one shade of grey where greyscale isn't appropriate.