# NCL precip diff 12lev

Canonical URL: https://colorcurio.us/colormaps/ncar.precip_diff_12lev
Source type: Colormap
Type: diverging
Collection: ncar
Attribution: NCL/NCAR — UCAR (via hhuangwx/cmaps MIT wrapper)
License: MIT (wrapper) / public-domain (data)
Source: https://raw.githubusercontent.com/hhuangwx/cmaps/master/cmaps/colormaps/ncar_ncl/precip_diff_12lev.rgb
Tags: diverging, climate, anomaly
Stops: 256

## Summary

NCL precip diff 12lev is a diverging colormap from the ncar collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

NCAR standard precipitation anomaly.

## Perceptual profile (OKLCh)

- Lightness: 0.598 → 0.327 (range 0.672, min 0.327, max 0.999); non-monotonic; midpoint 0.999
- Chroma: min 0.002, max 0.130, mean 0.092
- Hue: 57.4° → 242.3° (span 187.4°), path monotonic-cw; quadrants: orange, yellow, chartreuse, green, mint, cyan, azure, blue
- Endpoint temperature: warm → cool
- Perceptual ΔE: total 171.3, mean/step 0.672, max step 1.811, smoothness 0.500, speed 0.672

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 157.1; preserves order: yes
- Deuteranopia: ΔE total 147.3; preserves order: yes
- Tritanopia: ΔE total 136.1; preserves order: yes

## Related

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