colour octahedron, n.All

The Colour octahedron (n.) gives ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠white a special position, perhaps the source of its decisive difference from other colours.

The Colour octahedron (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠a grammatical, not psychological, representation of colour space: a bird's-eye view of grammatical rules.