Difference between Chrysler Blue and Chrysler Turquoise engine paint colors?

And Chrysler blue and Chrysler Turquoise are WAY, WAY different.
And after heat cycling over the years the paint takes on a different hue. I have seen turquoise look more green on the samples and cap that turns more blueish over time.

Any spray paint it seems to mismatch over time and sometimes from the start. Only way to get the same color is to paint the whole engine from one can.