What is inside of a Color Cube ?

color cube X -> R(0..1), Y -> G(0..1), Z -> B(0..1)
Houdini Experiment [2007-02-25]

X -> R(1..0..1), Y -> G(1..0..1), Z -> B(1..0..1) & X -> R(0..1..0), Y -> G(0..1..0), Z -> B(0..1..0)
Houdini Experiment [2007-02-25]