odd about the resto spec PDF's, there are no 200 numbers shown on any 55-59 truck chip sheet I've ever seen, all 700's except '59 - the 2nd number on the tag is a trim code & 200's are also RPO numbers
aside from that PDF including the AD specs for the 2nd half, the scanned page 102 [PDF page 45] shows
all colors being
RPO #243 [no wheel stripe color]

I'd go with 243 being a trim [RPO]code, and the 767 being the specific paint color .... probably took until 56 for them to get things reorganized, and of course the restoration packs are what someone was able to collect .... the 56 PDF doesn't give any paint code numbers, but lists both Empire Blue and Regal Blue, wheels black standard or upper body color for 2 tones, which I believe applied from 55.2-59
none of the other TF resto-paks show paint code numbers, the 58 doesn't even list the names, which is why I use paint chip sheets, mostly Dupont, which only shows 767 on the '57 sheet, but most of their sheets cite colors as "carried over from previous production"
Bill