diff --git a/discord/colour.py b/discord/colour.py
index 37346e890..76b8bf06d 100644
--- a/discord/colour.py
+++ b/discord/colour.py
@@ -65,7 +65,7 @@ class Colour:
         return not self.__eq__(other)
 
     def __str__(self):
-        return '#' + format(self.value, 'x')
+        return '#{:0>6x}'.format(self.value)
 
     def __hash__(self):
         return hash(self.value)