The upper chamber in many Westminster-style parliaments is called the "Red Chamber" or "Red House" due to the red upholstery of its seats and furnishings.
The tradition began in the UK Parliament's House of Lords, where benches, carpets, and draperies have been red for centuries. Red symbolized:
Former British colonies and influenced nations adopted the color code:
Red (Upper) = Review, tradition, appointed/hereditary, sovereignty
Green (Lower) = Popular will, elected, democratic action
While some nations have abandoned the color scheme, it remains a powerful visual shorthand for bicameral tradition.