Tag alias request: grey_hair <-> silver_hair

Reason: The wiki for silver_hair says that it also covers gray hair. Also, having a difference between grey hair and silver hair is really just splitting hairs if you ask me.

Edit: Checked the wiki for grey_hair and it kinda says that a distinction between it and silver hair has not been made. If the alias is not done, then this should be clarified. (I'll clarify it myself if necessary, since I upload a lot of those.)

I thought it was decided that grey hair was for older characters and silver hair was for younger characters.

It's been thoroughly discussed in forum #19777, and no, using a young/old dynamic to separate the tags is not ideal.

For what it's worth, here is my yardstick for tagging between the two:

• silver_hair: Lighter shading with a shiny sheen. Selvaria Bles is consistently drawn with silver hair, with post #550684 being a good example.
• grey_hair: Darker shading with a dull sheen. Nazrin tends to get drawn with grey hair, but she's just as likely to be drawn with silver as well. post #618454 and post #623079 are the best examples I can find.

I still stand by the young/old definitions, which was my stance back in that thread. I don't see that the outcome of that thread was all that clear-cut either, since it seems to have been mostly NWF Renim ramming his opinion through.

I'll repeat what my guidelines were back then (though obviously they are in contention) where:

young (with luster) & >50% brightness = silver_hair
young (with luster) & <50% brightness = black_hair
old (without luster) & grey = grey_hair

Whichever definition we agree on in the end, I'm against the alias in either direction.

Well, it's pretty simple: grey != silver.
Ambiguous? Make a judgement call.

Thus, two tags. The end.

I might have forced my opinion through, but I still stand by that there is nothing to gain by attaching the grey_hair tag to age. Images of aged characters are by far so insignificant, that you'd just be making the tag useless. As an example a tag like old is defined by the presence of grey_hair and wrinkles, to define grey_hair as being old with grey_hair then is pretty much making two tags with the same definition. Sure there are images of old without grey_hair, but that just makes it a subcategory of old... which is not very well populated at all.

edit: ah, failed to notice old is like adult or young, we don't have a specific umbrella tag for old characters besides like old_man and old_woman? Still doesn't do much in the way of grey_hair imo though. As grey_hair bound by age is still fairly redundant with any old age based tag.

edit2: In regards to the definition of silver_hair, the wiki was not updated after grey_hair was unaliased. So the wiki still reflects how it was when grey_hair was aliased to silver_hair. I went ahead and updated the silver_hair tag to reflect the current situation, and we can update it after we decide how we're going to define it differently from from grey_hair.