# CubicL

Canonical URL: https://colorcurio.us/colormaps/niccoli.CubicL
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: rainbow, geoscience
Stops: 256

## Summary

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

Cubic-law lightness rainbow with red top; modest perceptual deviation.

## Perceptual profile (OKLCh)

- Lightness: 0.411 → 0.765 (range 0.481, min 0.411, max 0.892); non-monotonic; midpoint 0.761
- Chroma: min 0.103, max 0.231, mean 0.175
- Hue: 323.1° → 50.3° (span 272.8°), path monotonic-ccw; quadrants: magenta, violet, blue, azure, cyan, mint, green, chartreuse, yellow, orange
- Endpoint temperature: cool → warm
- Perceptual ΔE: total 162.4, mean/step 0.637, max step 1.364, smoothness 0.525, speed 0.637

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 119.5; preserves order: yes
- Deuteranopia: ΔE total 105.2; preserves order: yes
- Tritanopia: ΔE total 149.7; preserves order: yes

## Related

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