She look like my Siamese mix who is actually LILAC and white. He has gold eyes, not blue eyes. His color did not change over time except that the lilac markings got a little darker. The color exactly matched the color on my lilac point Siamese's tail. It is neither beige nor grey but a combination of the two.
She looks to be cream and white. If she has stripes she's also a tabby. The stripes may go away as she gets older. She has a dilute coat- the dilute trait generally turns black to grey and orange/red to cream.