Added (back?) support for hexes without #...

for ColourConverter
Technically, this never was a documented feature in d.py, but
ColourConverter used to work without a #
Is this worth a versionchanged? I'll let other contributors decide

discord/ext/commands/converter.py

@@ -597,7 +597,8 @@ class ColourConverter(Converter[discord.Colour]):
         Add an alias named ColorConverter
 
     The following formats are accepted:
-
+    
+    - ``<hex>``
     - ``0x<hex>``
     - ``#<hex>``
     - ``0x#<hex>``
@@ -668,7 +669,9 @@ class ColourConverter(Converter[discord.Colour]):
 
         arg = arg.replace(' ', '_')
         method = getattr(discord.Colour, arg, None)
-        if arg.startswith('from_') or method is None or not inspect.ismethod(method):
+        if method is None:
+            return self.parse_hex_number(argument)
+        elif arg.startswith('from_') or not inspect.ismethod(method):
             raise BadColourArgument(arg)
         return method()