distal part of the tail has changed colour after injury

Question
after cat tried to snatch my pet albino who is 1 month, there was a cut in the tail which bleed..bleeding stopped after 5 mins..i gave all aseptic precautions..but after 1 day distal part of the tail seems darker, otherwise she is active and eating, is there anything to worry about??

Answer
This part of the tail is now necrotic.  Chances are it will end up drying up and falling off, but a vet should be seen in case there is more infection elsewhere. This area of the tail died due to the circulation being cut off which is why it turned darker.