There's just something about the color
red in the human psyche. It's the lowest visible color on the human color spectrum. It's the color of
blood. It symbolizes love and passion (and sometimes evil), and is a popular color in flags and heraldry. Much unlike
pink, red can be seen as a very masculine color, if not more than blue. However, it's also a common color for mature,
seductive ladies. If a language has only three primary color terms, they will invariably be black, white, and red.
Therefore this is an index of tropes involving the color red.
Tropes