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 4:6-7
6
The priest shall dip his finger in the blood, and sprinkle some of the blood seven times before Yahweh, before the veil of the sanctuary.
7
The priest shall put some of the blood on the horns of the altar of sweet incense before Yahweh, which is in the Tent of Meeting; and he shall pour out all of rest of the blood of the bull at the base of the altar of burnt offering, which is at the door of the Tent of Meeting.
