Another issue might be that some of them don't have the alternate colours (at least on iOS) - none of the emoji faces do and neither does "shaking hands" inexpl

Another issue might be that some of them don't have the alternate colours (at least on iOS) - none of the emoji faces do and neither does "shaking hands" inexplicably - people may try to set the colour on a face, it doesn't work, they assume it just doesn't work for any of them, etc. Apparently these are the ones with alternates: https://emojipedia.org/emoji-modifier-fitzpatrick-type-1-2/ https://emojipedia.org/emoji-modifier-fitzpatrick-type-1-2/