Four colors appear in the eyes of Zeir Anpin – white, red, green and black, corresponding to Chochmah, Binah, Tiferet and Malchut. The four compartments of the phylacteries shine into the brain cavities from them. That is, the Torah verses are the brain lobes, and the compartments are their cavities. The compartments are at the level of the six directions and the verses the first three Sfirot.
The illumination of the eyes are the six directions, so they bestow it on the compartments. There are seven that are called the eyes of Hashem; they are the seven lower Sfirot in the eye. White is Chesed, red Gvurah, green is Tiferet that comprises Netzach, Hod and Yesod, and black is Malchut. Sight is enabled by the black color in the eye, which is Malchut, as we explained in the Greater Gathering (section 209), as written, “upon one stone are seven eyes” (Zechariah 3:9).
They are the glowing colors from their aspect; namely, the seven levels of Chesed, Gvurah, Tiferet, Netzach, Hod, Yesod and Malchut that derive from the blackness in the eye. It says of them, “upon one stone,” which is Malchut, “are seven eyes,” the seven levels of Malchut.