
This cat turning blue is a natural part of their lives.
Adult cats suddenly change color once a year for a week due to how the cat's fur reacts to the gases in the air. These colors can be red, green, orange, blue, pink, yellow, purple, brown, black, and even more! This is normal for adult cats, and you should clean the cat once a week has passed from the start of the color change. Otherwise, your cat may permanently have their fur color changed!