Siamese mix can very. If you go to www.siameserescue.org
you will see that siamese mix can look like a DSH. I have siamese cats and the tail, ears, feet, and face have color. Depending on the color points the body can have color too.
Example of this:
Lilac Point the body color is glacial white (magnolia) the points frosty gray with slight pinkish tone. The nose leather and the paw pads are lavender pink.
Blue Point the body color is blush-white of glacial tone the points color blue-grey. The nose leather and the paw pads are blue-grey.
Seal Point the body color is beige to cream or pale fawn the points color dark seal brown. The nose leather and the paw pads are dark seal brown.
I will post some pics of my cats. Maybe you can tell then. This is just a few of the colors.
If you go to the lounge you can find my cats under the names of the cats. Violet is the Lilac Point. Simon is the Blue Point and DeDe is the Seal Point.
I hope this helps.