# Isolum CGO 80

Canonical URL: https://colorcurio.us/colormaps/colorcet.isolum-cgo80
Source type: Colormap
Type: sequential
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/isoluminant_cgo_80_c38_n256.csv
Tags: isoluminant, overlay
Stops: 256

## Summary

Isolum CGO 80 is a sequential colormap from the colorcet collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

## Perceptual profile (OKLCh)

- Lightness: 0.820 → 0.827 (range 0.019, min 0.816, max 0.835); non-monotonic; midpoint 0.817
- Chroma: min 0.090, max 0.113, mean 0.102
- Hue: 230.4° → 53.1° (span 177.3°), path monotonic-ccw; quadrants: azure, cyan, mint, green, chartreuse, yellow, orange
- Endpoint temperature: cool → warm
- Perceptual ΔE: total 77.3, mean/step 0.303, max step 0.361, smoothness 0.835, speed 0.303

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 47.5; preserves order: yes
- Deuteranopia: ΔE total 47.5; preserves order: yes
- Tritanopia: ΔE total 60.3; preserves order: no

## Related

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