The illustration is of the Top Supernal Triangle of the Tree of Life. Surrounded by the Ain (no-thing) the Ain Soph (without limit) and the Ain Soph Aur (limitless light).
The Qabalah is a language of Metaphysics and the letters are also numbers on the mathematical system of 10, which is both mathematical and philosophical.
Binah is black, as She is of the Limitless light, Chokmah is shown as blue in this illustration since Chokmah is Wisdom (The Blue Sophia of the Greeks) and is said to be a "cloud like gray which contains various colors and is mixed with them" (Golden Dawn Text).
The fact being, is that the Supernal Triangle is most difficult to understand, as no-thing exists there, To even begin to understand the Supernal, one must understand Absolute Zero as a mathematician would.; a nothing in the "absence of anything". Thus we have nothing, without limit and limitless light, which describes the "Space -Time continuum". Very abstract and subjective without positive ideas, all a formless Void. Some how we must formulate position. If anything is to exist in Nothing, then two imaginary opposites must come together in mutual annihilation and thus form a point. We could say this is where matter and anti-matter meet in mutual annihilation, causing the formation of the singularity. Or Negative Nothing unites with Positive Nothing becoming an annihilation of nothing forming a position and/or point. In very simple terms, Male and Female where concepts are united annihilated the individual concepts an became Androgyny, but as a Point..
In Quantum Physics an Entity, is called a point n time and in Qabalah that Point, is called Kether. With Kether we have established "neither parts nor magnitude, but only position". However, Position means nothing without a way to describe it, so another point must be established (Male-Female) . Thus we have the invention of the number two which makes possible the Line. At this stage The Line, doesn't mean very much as we have no measurement. So at this stage one can say that the Two Points are distant, for as of yet, there is no near or far from one another. We need a third thing to be able to discriminate these points from one another. Thus the Child is born of the Two parent points. The Triangle is invented, with this third Point, and now we have Surface. Appearing before us is the whole plane of Geometry, It can now be said that Point A is nearer to Point B , than A is to C. However, with only Surface, there is no substance and we are left with only theory, which is both inchoate and incoherent. This is where we have Abyss, as one cannot go any further with the idea in this purely imaginary world. We need the invention of the Actual, the Objective. or at the very least, and approach to the actual. So we need a fourth Point which is the foundation of Matter.
We now have the Point, the Line and the Plane for the Fourth point to exist, as matter or the Solid, it must lie inside the plane so we now have to define it by using three coordinated axis. Thus we say, "it is so many feet from the North wall and so many feet from the East wall and so many feet from the floor." Using imagination, we now have produced from Nothing a Something and also understand that Imagination is Creation. Thus matter being a Dream of Brahman, as the Hindus may state it, seems to bear out.
But we aren't done yet. for nothing can change when the only property of any given point is its relationship to certain other points. So a fifth point is necessary for transformation. Remember physics 101 and the First Law of Thermodynamics? If not, let me paraphrase, there is only one Energy that cannot be created nor destroyed only transformed. What transforms it is transition from one point to another, annihilating the points and becoming something else. That fifth point is Motion.,. Thus the implication of Time, for only through motion in time can an event happen.
Granted, this is a long story but it should be noted that Time is the Letter 5-Geburah, in the Hebrew Alphabet and is the number of the letter Heh. Thus we have the womb of the Great Mother, in which the Great Father, known as the phallic letter Yod and the ultimate pictorial Point, moves and begets active existence. Making it possible to have a concrete idea of a Point, and Objective Point, and that is called the "son of God and Goddess" and is known as the number 6th and the sixth Sephira, Tiphareth.; the self-conscious center of the system (Tree of Life) that is capable of experience. Therefore, Tiphareth, 6 rules over the lower Sephiroth on the Tree of Life, In Qabalah, the word Sephiroth means, "numbers" thus we have 10, in the number mathematical system of 10.
That is a fast and hopefully illuminating explanation of the Supernal Triangle which is not objective but is the establishment of the numbers 1 thru 3.
Chokmah is number Two, thus the idea of Male and female, positive and negative have become invented. It should be noted, that sexual repressive thought, a Victorian or puritanical idea of sexuality. will greatly retard or impede the ability to understand of the inner worlds.
The male phallus or Lingam , is the key symbol of Chokmah and the first differentiation of the One. Granted, it is at the least, the most abstract level of primary male qualities but it is just, as it represents the Supernal Father, emanating from the God Head, Kether. From Chokmah emerges the Supernal Mother, Binah. The parallels to the Book of Genesis and the Garden of Eden are obvious here, if one takes the Supernal Triangle to be the Garden of Eden itself.
This is a lengthy discussion and must be continued in another few blogs, Thank you for your interest and comments, May you live long and prosper.