Two colours are beginning to make a big appearance at the Rugby World Cup — and they might not be the ones you think. They aren’t black, white or even green and gold (important as these colours are as the tournament progresses), but rather come as two laminated cards that fit snugly into the pocket of either a shirt or a pair of shorts.

The colours made an appearance this past weekend in both their yellow and red forms, with catastrophic results for those who were shown them...

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