Repository: Rapptz/discord.py
File: discord/guild.py (Python)

Code before:
        """
        fields: Dict[str, Any] = {}
        if permissions is not MISSING:
            fields['permissions'] = str(permissions.value)
        else:
            fields['permissions'] = '0'

        actual_colour = colour or color or Colour.default()
        if isinstance(actual_colour, int):
            fields['color'] = actual_colour
        else:
            fields['color'] = actual_colour.value

        actual_secondary_colour = secondary_colour or secondary_color or Colour.default()
        actual_tertiary_colour = tertiary_colour or tertiary_color
        colours = {
            'primary_color': fields['color'],
        }

        if actual_secondary_colour is not MISSING:
            if isinstance(actual_secondary_colour, int):
                colours['secondary_color'] = actual_secondary_colour
            else:
                colours['secondary_color'] = actual_secondary_colour.value

        if actual_tertiary_colour is not MISSING and actual_tertiary_colour is not None:
            if isinstance(actual_tertiary_colour, int):
                colours['tertiary_color'] = actual_tertiary_colour
            else:
                colours['tertiary_color'] = actual_tertiary_colour.value

        fields['colors'] = colours

        if hoist is not MISSING:
            fields['hoist'] = hoist

        if display_icon is not MISSING:
            if isinstance(display_icon, bytes):
                fields['icon'] = utils._bytes_to_base64_data(display_icon)
            else:
                fields['unicode_emoji'] = display_icon

        if mentionable is not MISSING:
            fields['mentionable'] = mentionable

        if name is not MISSING:
            fields['name'] = name

        data = await self._state.http.create_role(self.id, reason=reason, **fields)
        role = Role(guild=self, data=data, state=self._state)


Review comment (suggestion):
```suggestion
        if actual_tertiary_colour is not MISSING:
```
you should be able to null it, also same comment as above

Code after:
            Creating the role failed.
        TypeError
            An invalid keyword argument was given.

        Returns
        --------
        :class:`Role`
            The newly created role.
        """
        fields: Dict[str, Any] = {}
        if permissions is not MISSING:
            fields['permissions'] = str(permissions.value)
        else:
            fields['permissions'] = '0'

        colours: Dict[str, Any] = {}

        actual_colour = colour or color or Colour.default()
        if isinstance(actual_colour, int):
            colours['primary_color'] = actual_colour
        else:
            colours['primary_color'] = actual_colour.value

        actual_secondary_colour = secondary_colour or secondary_color
        actual_tertiary_colour = tertiary_colour or tertiary_color

        if actual_secondary_colour is not MISSING:
            if actual_secondary_colour is None:
                colours['secondary_color'] = None
            elif isinstance(actual_secondary_colour, int):
                colours['secondary_color'] = actual_secondary_colour
            else:
                colours['secondary_color'] = actual_secondary_colour.value

        if actual_tertiary_colour is not MISSING:
            if actual_tertiary_colour is None:
                colours['tertiary_color'] = None
            elif isinstance(actual_tertiary_colour, int):
                colours['tertiary_color'] = actual_tertiary_colour
            else:
                colours['tertiary_color'] = actual_tertiary_colour.value

        fields['colors'] = colours

        if hoist is not MISSING:
            fields['hoist'] = hoist

        if display_icon is not MISSING:
            if isinstance(display_icon, bytes):
                fields['icon'] = utils._bytes_to_base64_data(display_icon)
            else: