# CubicYF

Canonical URL: https://colorcurio.us/colormaps/niccoli.CubicYF
Source type: Colormap
Type: sequential
Collection: niccoli
Attribution: Matteo Niccoli — pmkmp.m (MATLAB Central FX 28982)
License: BSD-3 (Niccoli, mycarta)
Source: https://github.com/mycarta/PMKMP/blob/master/pmkmp/pmkmp.m
Tags: perceptually-uniform, rainbow, geoscience
Stops: 256

## Summary

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

Cubic-law lightness rainbow; fully perceptual; the canonical Niccoli geoscience map.

## Perceptual profile (OKLCh)

- Lightness: 0.462 → 0.892 (range 0.430, min 0.462, max 0.892); monotonic; midpoint 0.721
- Chroma: min 0.103, max 0.229, mean 0.182
- Hue: 314.4° → 120.5° (span 193.9°), path monotonic-ccw; quadrants: magenta, violet, blue, azure, cyan, mint, green
- Endpoint temperature: cool → warm
- Perceptual ΔE: total 115.6, mean/step 0.453, max step 1.054, smoothness 0.495, speed 0.453

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 94.7; preserves order: yes
- Deuteranopia: ΔE total 88.5; preserves order: yes
- Tritanopia: ΔE total 100.6; preserves order: yes

## Related

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