Originally Posted by AMYSCRAZY
What exactly does underlying color mean? Keller has the pinkest skin I have ever seen, no sign of color on her.
the colour of the spot will reveal to you what colour your cat is, genetically speaking.
Cats have two colours only- red and black. All other colours are modifications of these colours. The dilution factor for example leads to an uneven distribution of black pigments in the hairs- thus making the fur seem gray as seen in Russian Blue cats. White is not a colour as such- it is the absence of colour.
The colours are found on the X chromosome, so a cat with XX can have two colours while a tom cat, XY, can only have one colour.
In a pure white cat the white colour is covering up the actual colour of the cat- if the spot on the head is gray the cat is genetically speaking black and has two copies of the dilution factor, making the black seem grey.
For some reason white cats are born showing their true colours on the back of their head. This colouration fades from 6 months onwards untill the spot is gone.