The white/gold thing is literally nothing like that longass explanation.
The closest explanation there is is afterimages-- if you stare at a color, then look at a blank surface, you see the opposite color. The opposite color of blue is yellow-ish tones, so you'd see yellow/gold. The opposite of black is white. Stare at the dress for like 2 minutes then look at a blank wall.
Idk what this mess about mixing is, but it's nonsense.