Pretty much every desktop Mac from the later Plus to the "beige" G3 should be the same color "Platinum". The earlier Plus and before (including the LISA) should be the brownish-tan "Apple Beige". (That's right, the "beige" G3 is actually "Platinum". It's just that compared to the more colorful successors, it was considered to be beige.)
The pictures on the Low End Mac
Plus page show the two colors fairly well. Yup, the top one is "Platinum", and is a color picture, not B&W.
If you want to see them in the exact same lighting, I can take a picture of my remarkably un-yellowed 128 next to my un-yellowed SE/30 so you can compare.
And if you really want to go nuts, I can include an Apple //c, which is the unique Snow White "Fog" color that was abandoned for "Platinum" for every later model. (All of my //c's were fairly yellowed when I got them, but I have cleaned one up so that it looks as close to original as I can figure.)
So, in short:
Lisa, Lisa 2, Mac XL, 128, 512, early Plus, 512Ke: "Apple Beige"
Apple IIc: Snow White "Fog"
Apple IIc+, later Mac Plus, SE, II, and all later through "beige" G3: "Apple Platinum"
(Other than the MacTV and PowerBooks, of course.)
Then there are the two colors of PowerBook, the early lighter gray, and the later darker gray. (And the mixed-shade 500-series!)