The "snow white" color (not to be confused with the "snow" color used on iMac G3s) was, as I recall, named for a design language of the same name (in which all the products had codenames of the dwarfs--read the old AppleDesign book for more on this).

The color was used only on a few products, all of which were produced in the mid-1980s:

-Original Apple IIc (platinum came about with the IIc+)

-UniDisk 3.5" drive

-Mouse IIc (which has a more recessed button than the other serial mice and is uniform in color)

-Disk IIc (a 5.25" drive)

-ImageWriter IIs produced in 1985-1986

It looked as though some of the prototype Macs were in this color as well, such a BigMac and BabyMac. The Cassie Keyboard prototype was also white.