# Isolum CGO 70

Canonical URL: https://colorcurio.us/colormaps/colorcet.isolum-cgo70
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_70_c39_n256.csv
Tags: isoluminant, overlay
Stops: 256

## Summary

Isolum CGO 70 is a sequential colormap from the colorcet collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

## Perceptual profile (OKLCh)

- Lightness: 0.734 → 0.755 (range 0.025, min 0.729, max 0.755); non-monotonic; midpoint 0.731
- Chroma: min 0.094, max 0.134, mean 0.106
- Hue: 230.8° → 39.7° (span 191.1°), path monotonic-ccw; quadrants: azure, cyan, mint, green, chartreuse, yellow, orange
- Endpoint temperature: cool → warm
- Perceptual ΔE: total 86.5, mean/step 0.339, max step 0.396, smoothness 0.883, speed 0.339

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 51.1; preserves order: yes
- Deuteranopia: ΔE total 49.1; preserves order: yes
- Tritanopia: ΔE total 65.9; preserves order: no

## Related

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