Not sure what you mean by classical?
Standard IBM colors are pearl / pebble, and in a 101 key layout. Note that you will have to also order the spacebar as well, you will want the 'large' size (7x width).
Unicomp also has keys available in black, grey or white (plus a myriad of other colors) in 104 (old style), 104 (new style), 103 and 105 key layouts.
101 and 103 use the large spacebar, both 104s use the small spacebar.