# Gkr

Canonical URL: https://colorcurio.us/colormaps/colorcet.gkr
Source type: Colormap
Type: diverging
Collection: colorcet
Attribution: Kovesi 2015 — "Good Colour Maps: How to Design Them" (arXiv:1509.03700)
License: CC-BY-4.0
Source: https://raw.githubusercontent.com/holoviz/colorcet/main/assets/CET/diverging_gkr_60-10_c40_n256.csv
Tags: dark-bg, dark-midpoint, diverging
Stops: 256

## Summary

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

## Perceptual profile (OKLCh)

- Lightness: 0.637 → 0.679 (range 0.433, min 0.246, max 0.679); non-monotonic; midpoint 0.246
- Chroma: min 0.007, max 0.206, mean 0.104
- Hue: 140.4° → 32.8° (span 107.5°), path monotonic-ccw; quadrants: green, orange
- Endpoint temperature: warm → warm
- Perceptual ΔE: total 113.0, mean/step 0.443, max step 0.735, smoothness 0.814, speed 0.443

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 89.5; preserves order: yes
- Deuteranopia: ΔE total 97.7; preserves order: yes
- Tritanopia: ΔE total 107.3; preserves order: no

## Related

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