The Tailwind UI updated color palette at https://www.npmjs.com/package/@tailwindcss/ui has true greys with no color hue.
And you don't need Tailwind UI to use the updated colors (I asked Adam once). I think the plan is the updated color palette will eventually be rolled into a future Tailwind CSS update, if not already.
"During early access, the components in Tailwind UI depend on some extensions we've added to the default Tailwind CSS config (like extra spacing values, updated, colors, additional shadows, etc.)
"These extensions will make their way into Tailwind itself in the future...."
The bottom of Tailwind UI documentation gives more info on the color palette changes, including the new grey:
https://tailwindui.com/documentation#how-tailwindcss-ui-exte...