We found some interesting answers on the official website of the spectacular ceremony. Quickly, here’s what we learned:

Bright colours distinguished friend from foe as armies faced each other on the battlefield, where they engaged each other with volley fire, from muskets.

Red is the hardest colour to see, merges when seen at a distance. The red coats of the British troops, made it difficult for enemy spotters to count their strength.

Myth: Blood would not show on the red tunics and demoralise the other troops.

The real reason: Cost-saving! The dyeing process required for red involved only one stage and red pigment was readily available.

Complete details on www.changing-guard.com