The difference between blue ray and green ray.

[GentleReckoning]

Nowadays, I would use communion as best descriptor for green ray activity/seeking.  Communion is something more general and encompassing than relationships; which is more a yellow-ray bonding type of function.  Communion is about being able to be with the heart of someone, no matter where they are at on their journey, or what joys or difficulties they are experiencing.  True communion sometimes needs words; a lot of the time it doesn't.  Communion also doesn't distinguish between someone you have met for the first time, or someone who has been a family member your whole life.  You can be with them because soul essence does not really need to distinguish age or familiarity; there is a recognition of the 'sameness' between you and I, despite the many outward indicators that can measure things on a scale that seemingly lend itself to difference and separation.

I would add to your definition, and perhaps simplify it just a bit. The general gist of your answer here dovetails with mine.

Acceptance is pretty big for the green ray. If there is little acceptance, there is little work in the yellow or blue energy centers. If there is great acceptance, then there is potential for work in the blue and yellow. This coloring the type and depth of connections and communion possible between an entity and others. Then there is the strength of boundaries as well, this refining the filter to a great extent as the entity begins to fine tune it's seeking relative to it's environment.