Technicolor 3 strip process 

Please take a look here –

https://youtu.be/jol0xR0ToUk

This is my version of this

and the original is here

Please take the time to look at both.

This is a summary of the steps involved

Sort out primary grade
Add 2x seriel nodes and name them Red and Cyan.
Click on the RGB mixer and select monochrome plus preserve luminance (checked by default).
Take out the green and blue to just leave red.
Second serial node (Cyan) select preserve luminance (checked by default) but NOT monochrome take out all
the red.
Adjust the key level down to 0.33 which is roughly 1 third.
Add parallel (right click –  add node –  parallel node) and add two more outputs (right click)
Now add a corrector node(right click) and then a series node onto that. Name them Green and Magenta.
Don’t forget to connect up the inputs and outputs.
On the Green node after selecting monochrome leave only green.
On the Magenta node take away all the green.
Adjust the key level down to 0.33 which is roughly 1 third.
Now add a corrector node(right click) and then a series node onto that. Name them Blue and Yellow.
On the Blue node after selecting monochrome leave only blue.
On the Yellow node take away all the blue.
Adjust the key level down to 0.33 which is roughly 1 third.
Finally add a working node and shift the hue from 50 to 100.
you can now grab a still which will store this info and also promote it to the gallery and then to power grade and even export as a LUT