# Tarn

Canonical URL: https://colorcurio.us/colormaps/cmocean.tarn
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, brown-blue
Stops: 256

## Summary

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

Designed for terrestrial / land anomaly fields.

## Perceptual profile (OKLCh)

- Lightness: 0.239 → 0.258 (range 0.741, min 0.239, max 0.980); non-monotonic; midpoint 0.980
- Chroma: min 0.005, max 0.117, mean 0.067
- Hue: 133.2° → 267.1° (span 233.1°), path folded; quadrants: green, chartreuse, yellow, orange, mint, cyan, azure, blue
- Endpoint temperature: neutral → cool
- Perceptual ΔE: total 191.1, mean/step 0.749, max step 0.864, smoothness 0.908, speed 0.749

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 160.2; preserves order: yes
- Deuteranopia: ΔE total 163.7; preserves order: yes
- Tritanopia: ΔE total 184.5; preserves order: yes

## Related

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