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.
(References: Apocalypse Explained 507; Apocalypse Revealed 426; Arcana Coelestia 7691)
Leviticus 23:4-9
4
"'These are the set feasts of Yahweh, even holy convocations, which you shall proclaim in their appointed season.
5
In the first month, on the fourteenth day of the month in the evening, is Yahweh's Passover.
6
On the fifteenth day of the same month is the feast of unleavened bread to Yahweh. Seven days you shall eat unleavened bread.
7
In the first day you shall have a holy convocation. You shall do no regular work.
8
But you shall offer an offering made by fire to Yahweh seven days. In the seventh day is a holy convocation: you shall do no regular work.'"
