CubicYF

Summary

CubicYF is a sequential colormap from niccoli. Lightness rises monotonically from 0.46 to 0.89, hue sweeps 194° from magenta to green, and order holds under all three colorblind simulations.

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: niccoli
• Source: Matteo Niccoli — pmkmp.m (MATLAB Central FX 28982)
• Similar sequential maps: CubicL, IsoL, LinearL, LinLhot, Sawtooth
• All colormaps