# Isolum CJO

Canonical URL: https://colorcurio.us/colormaps/colorcet.isolum-cjo
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_cjo_70_c25_n256.csv
Tags: diverging, isoluminant, overlay
Stops: 256

## Summary

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

## Perceptual profile (OKLCh)

- Lightness: 0.736 → 0.755 (range 0.020, min 0.735, max 0.755); non-monotonic; midpoint 0.742
- Chroma: min 0.002, max 0.159, mean 0.074
- Hue: 236.2° → 39.7° (span 163.8°), path monotonic-cw; quadrants: azure, blue, orange
- Endpoint temperature: cool → warm
- Perceptual ΔE: total 55.1, mean/step 0.216, max step 0.427, smoothness 0.595, speed 0.216

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 42.7; preserves order: yes
- Deuteranopia: ΔE total 49.0; preserves order: yes
- Tritanopia: ΔE total 62.1; preserves order: no

## Related

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