Kabbalah su I Samuele 17:78

... Four letters are clothed in these four colors: Y in the color white, H in the color red, V in the color green, H in the color black ... And it is the form of the lines in the forehead as the form of YHVH, and these are impressions/tracings of lines, which are “depth of height and depth of below and depth of east and depth of west”. Short lines from the eye, from the side of the letter Y’; lines along the length of the mouth in height, from the side of the three letters that are HVH; all of them are made known in the shi`ur qomah of the human/ bar nash.