# Edge

Canonical URL: https://colorcurio.us/colormaps/niccoli.Edge
Source type: Colormap
Type: diverging
Collection: niccoli
Attribution: Matteo Niccoli — pmkmp.m (MATLAB Central FX 28982)
License: BSD-3 (Niccoli, mycarta)
Source: https://github.com/mycarta/PMKMP/blob/master/pmkmp/pmkmp.m
Tags: diverging, goethe
Stops: 256

## Summary

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

Goethe Edge Colors; black-blue-cyan-white-yellow-red-black for ratio data.

## Perceptual profile (OKLCh)

- Lightness: 0.000 → 0.000 (range 0.999, min 0.000, max 0.999); non-monotonic; midpoint 0.998
- Chroma: min 0.000, max 0.313, mean 0.165
- Hue: 0.0° → 0.0° (span 360.0°), path folded; quadrants: blue, azure, cyan, chartreuse, yellow, orange, red
- Endpoint temperature: null → null
- Perceptual ΔE: total 327.7, mean/step 1.285, max step 3.203, smoothness 0.416, speed 1.000

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 241.2; preserves order: yes
- Deuteranopia: ΔE total 245.6; preserves order: yes
- Tritanopia: ΔE total 256.8; preserves order: yes

## Related

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