# Gist NCAR

Canonical URL: https://colorcurio.us/colormaps/matplotlib.gist_ncar
Source type: Colormap
Type: sequential
Collection: matplotlib
Attribution: matplotlib developers
License: matplotlib (BSD-derived)
Source: https://github.com/matplotlib/matplotlib/blob/main/lib/matplotlib/_cm.py
Tags: cartographic, rainbow, climate
Stops: 256

## Summary

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

NCAR atmospheric ramp.

## Perceptual profile (OKLCh)

- Lightness: 0.271 → 0.978 (range 0.707, min 0.271, max 0.978); non-monotonic; midpoint 0.818
- Chroma: min 0.004, max 0.313, mean 0.207
- Hue: 264.1° → 121.6° (span 281.1°), path monotonic-ccw; quadrants: blue, azure, cyan, mint, green, chartreuse, yellow, orange, red, rose
- Endpoint temperature: cool → null
- Perceptual ΔE: total 298.5, mean/step 1.171, max step 6.584, smoothness 0.098, speed 1.000

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 247.1; preserves order: no
- Deuteranopia: ΔE total 225.8; preserves order: no
- Tritanopia: ΔE total 247.6; preserves order: no

## Related

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