Color
wavelength of light in the visible electromagnetic spectrum (380-750 nm)
the perceptual dimension that encodes emotion in prysm and carries evolutionary survival signals
the visible spectrum
| color | wavelength | emotion | arousal |
|---|---|---|---|
| red | 620-750 nm | anger | highest |
| orange | 590-620 nm | disgust | high |
| yellow | 570-590 nm | surprise | high |
| green | 495-570 nm | joy | medium |
| blue | 450-495 nm | interest | low |
| indigo | 420-450 nm | sadness | low |
| violet | 380-420 nm | fear | lowest |
physics
- color is electromagnetic radiation — oscillating electric and magnetic fields
- wavelength determines energy: shorter wavelength = higher energy per photon
- human cone cells: S (short/blue), M (medium/green), L (long/red) — three channels, infinite perception
biology
- trichromatic vision evolved in primates for foraging: detecting ripe fruit against green foliage
- chlorophyll absorbs red and blue, reflects green — the color of life is what photosynthesis rejects
- color vision is a survival technology: threat detection, food selection, mate assessment, navigation
in the cybergraph
- color is the semantic channel between protocol state and human perception
- see color-emotion spectrum for the full evolutionary theory
- see emotion for implementation in prysm