Color Point Cat Tip
Siamese and Himalayans have light-colored chests and abdomens; their darker ear tips, feet, tails and faces range from flame point to lilac point to seal point.
This color difference, called color points, is due to genes that are affected by temperature: Cooler temperatures produce darker hair; warmer temperatures, lighter hair.
The tail, ear tips and feet are darkest since the temperature of these body parts is lower than at the center of the body.
For more information, please read the story Cats and Color Points.