Red is such an interesting color to correlate with emotion, because it's on both ends of the spectrum. On one end you have happiness, falling in love, infatuation with someone, passion, all that. On the other end, you've got obsession, jealousy, danger, fear, anger and frustration. ~ Taylor Swift

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Beautiful. Red is both beautiful and aggressive. It represents love, passion, power, danger, urgency. It speedily reveals the life saving water of fire hydrants. On signs, it flashes danger warnings with slashes or Xs. It illuminates the cross of the Red Cross, as a symbol of urgency and compassion. It is a color or extremes, of polarities.