Colour Theory, Linear Algebra, Vector Space, Colorimetry, Linear Transformation.
point is at (x = 1/3, y =1/3) on the diagram and obviously z = 1/3. As z increases, the chromaticity triangle projected onto an x-y plane reduces to a similar triangle with the white point at (x = 1/3, y =1/3). We can imagine that the 3D colour space looks like a triangular pyramid formed by these