# Isolum CJM

Canonical URL: https://colorcurio.us/colormaps/colorcet.isolum-cjm
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-isoluminant_cjm_75_c24_n256.csv
Tags: diverging, isoluminant, overlay
Stops: 256

## Summary

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

## Perceptual profile (OKLCh)

- Lightness: 0.782 → 0.801 (range 0.027, min 0.774, max 0.801); non-monotonic; midpoint 0.784
- Chroma: min 0.004, max 0.148, mean 0.072
- Hue: 224.7° → 331.1° (span 109.4°), path monotonic-cw; quadrants: azure, rose
- Endpoint temperature: cool → warm
- Perceptual ΔE: total 55.9, mean/step 0.219, max step 0.425, smoothness 0.587, speed 0.219

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 36.5; preserves order: yes
- Deuteranopia: ΔE total 35.8; preserves order: yes
- Tritanopia: ΔE total 56.6; preserves order: yes

## Related

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