Berries should be capped, or I think I read it could go to Abyssal...but that's inconclusive.
I would personally see if going backwards (apples) would reproduce the same steps, but going in reverse obviously. But that's me.
Right now I did the apple path, got to Dalamud, then went the following:
Dalamud Red --> 2 Plum = Blood Red (I thought I could produce a different red that wasnt Blood Red, but guess not?)
Blood Red --> 13 Pear = Plum Purple (Decide to see if I could get to the green color line just like how berries moved itself over to the blue color line (Royal blue))
Plum Purple --> 1 Pear = Blood Red (/shrug)
(This is stopping on first new feathers, for clarity).
I'm continuing on pears from here on out until...idk.