# Rainbow

Canonical URL: https://colorcurio.us/colormaps/colorcet.rainbow
Source type: Colormap
Type: sequential
Collection: colorcet
Attribution: Kovesi 2015 — "Good Colour Maps: How to Design Them" (arXiv:1509.03700)
License: CC-BY-4.0
Source: https://raw.githubusercontent.com/holoviz/colorcet/main/assets/CET/rainbow_bgyrm_35-85_c69_n256.csv
Tags: rainbow, perceptually-uniform
Stops: 256

## Summary

Rainbow is a sequential colormap from the colorcet collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

## Perceptual profile (OKLCh)

- Lightness: 0.470 → 0.807 (range 0.380, min 0.470, max 0.850); non-monotonic; midpoint 0.849
- Chroma: min 0.077, max 0.284, mean 0.168
- Hue: 264.1° → 328.1° (span 296.0°), path monotonic-ccw; quadrants: blue, azure, cyan, mint, green, chartreuse, yellow, orange, red, rose, magenta
- Endpoint temperature: cool → cool
- Perceptual ΔE: total 196.8, mean/step 0.772, max step 1.940, smoothness 0.553, speed 0.772

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 165.4; preserves order: no
- Deuteranopia: ΔE total 156.4; preserves order: no
- Tritanopia: ΔE total 132.3; preserves order: no

## Related

- Family: https://colorcurio.us/colormaps/families/colorcet
- All colormaps: https://colorcurio.us/colormaps