# Gouldian

Canonical URL: https://colorcurio.us/colormaps/colorcet.gouldian
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/linear_kbgyw_10-98_c63_n256.csv
Tags: perceptually-uniform, dark-bg
Stops: 256

## Summary

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

## Perceptual profile (OKLCh)

- Lightness: 0.224 → 0.983 (range 0.759, min 0.224, max 0.983); monotonic; midpoint 0.588
- Chroma: min 0.000, max 0.214, mean 0.155
- Hue: 174.6° → 179.0° (span 205.8°), path folded; quadrants: magenta, violet, blue, azure, cyan, mint, green, chartreuse
- Endpoint temperature: null → null
- Perceptual ΔE: total 186.0, mean/step 0.730, max step 6.831, smoothness 0.019, speed 0.730

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 162.9; preserves order: yes
- Deuteranopia: ΔE total 162.7; preserves order: yes
- Tritanopia: ΔE total 132.4; preserves order: yes

## Related

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