HMBCUDA, if that is your 340 in your avitar it sure looks like blue to me. Same color as my '69 is, and always was. Good match to the P4349217 blue Mopar spray paint. What they call "turquoise" is that light green like toolmanmike pictured.
I just got what you and Furyous2 are saying...it may be a different color all together from the 383's I was thinking it was the same color as the big blocks...
I should PM you on this one, I married a girl from Torrington, CT and got married there too! You might know them, small town.