STOP THE PRESSES!!
I found it.
Kevin and Bryon, thank you for your interest, but I finally found the answer.
To recount, Corvette's 1968 Le Mans Blue was a
different color than Corvette's 1969 Le Mans Blue. QUESTION: Was Camaro's 1968 Le Mans Blue also a
different color from Camaro's 1969 Le Mans Blue? Or, because of the January introduction, did Camaro have the 1969 Le Mans Blue, just like Corvette?
ANSWER: Camaro's 1968 Le Mans Blue was a different color than Camaro's 1969 Le Mans Blue.
Primary source documentation:
1968 LE MANS BLUEOK, click this link and scroll down to the big DuPont paint chip chart. This a 1968
revised chart showing all four added Camaro colors (even though they messed up the Corvette Bronze information):
http://paintref.com/cgi-bin/chipdisplay.cgi?year=1968&manuf=GM&smodel=Buick&info=yes&page=54OK, so DuPont indicates that the 1968 code U (Camaro only for code U) is Le Mans Blue and the DuPont paint code is 4908.
Now, is that 4908 paint code the code for the Le Mans Blue used on the 1968 Corvette? Yes. Click this link and scroll down:
http://paintref.com/cgi-bin/chipdisplay.cgi?year=1968&manuf=GM&smodel=Buick&info=yes&page=51So we know that the same 1968 Le Mans Blue was used on both Camaro and Corvette.
1969 LE MANS BLUEThe 1969 DuPont paint chip chart is very clear that the 1969 Le Mans Blue was no longer coded 4908, it was now coded 5030. This confirms that the 1969 Camaro had a new formula for Le Mans Blue. Click this link and scroll down:
http://paintref.com/cgi-bin/chipdisplay.cgi?year=1969&manuf=GM&smodel=Buick&info=yes&page=40You can see that code 71 (Camaro) and code 976 (Corvette) are indicated for the 1969 Le Mans Blue, DuPont code 5030.
THE GM (Fisher Body) WA PAINT CODESThe 1968 GM paint code for Le Mans Blue is WA3742. The link below is missing the page with the WA code, but my Corvette research verifies that the GM code was WA3742. However, we can check another way: under the Code 976 Le Mans Blue color chip we see Sherwin Williams code 2766. See this link and scroll down:
http://paintref.com/cgi-bin/chipdisplay.cgi?year=1968&manuf=GM&smodel=Buick&info=yes&page=70The 1969 GM paint code for Le Mans Blue is WA3962. The Sherwin Williams Le Mans Blue Code 976 is no longer 2766, it is now 2896. See this link and scroll down:
http://paintref.com/cgi-bin/chipdisplay.cgi?year=1969&manuf=GM&smodel=Buick&info=yes&page=58So, the short of it is this: Camaro's 1968 Le Mans Blue was a different color than Camaro's 1969 Le Mans Blue. On chip charts the colors look very similar, but the fact that GM assigned a new WA code to the 1969 color means that the color had a very different formula.
As you can see, the order code, or trim tag code, means nothing when determining the paint color. The order/tag code is exclusive to that car, for that year, for that color. As an example, Hugger Orange (GM WA3959) on Camaro was three different order codes/trim tag codes: 72 (in 1969), 65 (in 1970), and 78 (in 1976). Same color, same GM WA code, three different
order codes used by dealerships. To really foul up things, Corvette used Hugger Orange in 1969, but called it Monaco Orange with trim tag code 990.
By the way, use caution on the Paint Ref site. I tend to trust only the actual manufacturer charts. They are the only primary sources that should be used, and even they have some issues. Some of the Paint Ref "grid" information is incorrect.
Thanks for your help and interest. I promise not to be so wordy the next time a pose a question!