Unable to change name and slug for default colors

I am unable to change the Name or Slug for the default colors. I can change the color. I can add color, name and slug for custom colors. It would seem since the option is there in the form that I should be able to change the name and slug for the default color, but it fails to work with either the Astra theme or the default WP Twenty Twenty one theme. All other plugins disabled, running WP 5.7.