Originally posted by Kater
Yes, I think that is the exact reason the color becomes darker.

I notice that my Nipo's nose is most pink after we take her out the carrier when she has been in the car to go to the vet. The reason her nose is pink is that she has been meowing non-stop and is quite irked at her hoomans. How could we be so cruel!
LOL .... yes, how could those hoomans dare to take kitties to the White Coats!