1964 - 1974 Factory Engine Paint Chart
I’m sure mopar knew they just didn’t care.
And yes I agree only way to know for sure is an untouched original.
The red fades and looks orange. The turquoise can look blue or greenish.
Hell that Gibson place that sells the paint regarded as the best match says there’s the orange used on 440’s and a totally diffrrrnt orange that’s used on a 340.