First off, I have no idea whether I'm getting the right dye colours or whether it's just an issue with the name/number feedback on the dyes on the Rest -> Craft -> View Item Colours option. The dye pot colours themselves display the name of the dye the character is feedbacked to be activating.
I'm always selecting 'all' colours on the armor
because I can't afford 20 dyes but the helmet doesn't have an option to select parts.
This doesn't always happen. I managed to dye some things black and the feedback is black. But I did also have the same issues with the black pots giving me a different name in the feedback menu until I threw more dyes at the attire to make it go away and took the other screenshot when noticing it was happening every so often.