"Neopaganism and Wicca
Air as one of the four elements appears in many neopagan traditions. Wicca in particular was influenced by the Golden Dawn system of magic. Gerald Gardner, one of the founders of Wicca, was in contact with Aleister Crowley and incorporated elements of Crowley’s works into Wiccan rituals. Many practicing Wiccan traditions therefore use attributions inspired by the Golden Dawn, but there are many variations as well. Common attributions include:
The cardinal direction of east.
Yellow, or pastel colors. (Some associate air with green or even a light blue.)
The athame or the wand. (...)
There are diferent colors for the elements, depending on many factors like culture, in the time i did this ilustration I felt that air were more green
Thanks for the comment