1977 Was the first year for "Pacific Blue" and "Ice White". I have the original dealer brouchure and original owners manual calling out the colors and codes:
USA Small Tank: Cherokee Red E222
USA Large Tank: Polychrome Blue Heavy Fleck C7983
The original Dealers Brouchure I have states that "Pacific Blue" was the new color for 1977. Here's a pic:
If your interested in the Original Owner's Manual, Parts Manual, and Workshop Manual for your bike (parts manual also includes 1976 models) please check the member's list and email me. I'll send you a link where each can be downloaded.
I scanned all my original documentation and converted it into .pdf format.
Regards,
Former 77T140V Pacific Blue/Ice White owner converted to '79 colors ...... Tom