# Curl

Canonical URL: https://colorcurio.us/colormaps/cmocean.curl
Source type: Colormap
Type: diverging
Collection: cmocean
Attribution: Thyng, Greene, Hetland, Zimmerle, DiMarco 2016, Oceanography 29(3)
License: MIT
Source: https://matplotlib.org/cmocean/
Tags: oceanography, blue-red
Stops: 256

## Summary

Curl is a diverging colormap from the cmocean collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

Designed for vorticity / curl fields with smooth zero crossing.

## Perceptual profile (OKLCh)

- Lightness: 0.249 → 0.245 (range 0.732, min 0.245, max 0.977); non-monotonic; midpoint 0.977
- Chroma: min 0.009, max 0.151, mean 0.085
- Hue: 271.0° → 326.4° (span 304.6°), path monotonic-ccw; quadrants: violet, blue, azure, cyan, mint, green, chartreuse, orange, red, rose, magenta
- Endpoint temperature: cool → cool
- Perceptual ΔE: total 191.0, mean/step 0.749, max step 0.954, smoothness 0.872, speed 0.749

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 164.2; preserves order: yes
- Deuteranopia: ΔE total 162.5; preserves order: yes
- Tritanopia: ΔE total 169.6; preserves order: yes

## Related

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