• Anger

• the emotion of red — high-arousal threat response
• Wavelength: 620-750 nm
• evolutionary origin:: fire, blood, thermal injury — death from burn
• flushed faces during aggression signal dominance. perceiving red heightens anger responses from ancestral threats like fire or wounds

• in prism

  • signals danger, overload, critical failure
  • a counter in anger state: resource depleted, threshold crossed, system under attack
  • the strongest warning the interface can give