Green
The color green is almost exclusively used in connection with plants in the Bible, and the meaning is closely connected to the meaning of plants as well. Plants, in general, represent facts, knowledge that we can gather from the world. Green plants are ones that are alive and growing. Since life represents love and goodness, it makes sense that green plants are facts that have the potential for good use. It also indicates that they are the kinds of things we learn through directly through our senses, since to identify green plants we need to actually see the greenness.
(Reference: Apocalypse Explained 507; Apocalypse Revealed 426; Arcana Coelestia 7691)
Mark 11:28-33
28
and they began saying to him, "By what authority do you do these things? Or who gave you this authority to do these things?"
29
Jesus said to them, "I will ask you one question. Answer me, and I will tell you by what authority I do these things.
30
The baptism of John--was it from heaven, or from men? Answer me."
31
They reasoned with themselves, saying, "If we should say, 'From heaven;' he will say, 'Why then did you not believe him?'
32
If we should say, 'From men'"--they feared the people, for all held John to really be a prophet.
33
They answered Jesus, "We don't know." Jesus said to them, "Neither do I tell you by what authority I do these things."
