Tailwind has had 3 different versions of its colour palette.
So the closest Tailwind colour to your hexcode may vary depending on which version of Tailwind you're using.
Tailwind 3.3 added more shades to the Tailwind 3.0-3.2 colour palette.
Tailwind 3.0 added many colours to the palette from Tailwind 2.
See the various Tailwind colour palettes
A tool to convert a hexcode to the most similar colour from the Tailwind v2 colour palette
Enter a colour, get a Tailwind v2 colour name
#FFFFFF
#ed3939