BatlowK

Summary

BatlowK is a sequential colormap from crameri. Lightness rises monotonically from 0.12 to 0.90, hue sweeps 306° from blue to magenta, and order holds under all three colorblind simulations.

batlow variant with black start. Sourced from ScientificColourMaps8/batlowK/batlowK.txt.

Perceptual profile (OKLCh)

• Lightness: 0.119 → 0.899 (range 0.781, min 0.119, max 0.899); monotonic; midpoint 0.594
• Chroma: min 0.014, max 0.117, mean 0.072
• Hue: 272.4° → 326.3° (span 306.2°), path monotonic-ccw; quadrants: blue, azure, cyan, mint, green, chartreuse, yellow, orange, red, rose, magenta
• Endpoint temperature: cool → cool
• Perceptual ΔE: total 134.8, mean/step 0.529, max step 0.552, smoothness 0.990, speed 0.529

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 119.5; preserves order: yes
• Deuteranopia: ΔE total 121.0; preserves order: yes
• Tritanopia: ΔE total 104.7; preserves order: yes

Related

• Family: crameri
• Source: Crameri 2018, Scientific Colour Maps (https://www.fabiocrameri.ch/colourmaps/)
• Similar sequential maps: Acton, Bamako, Batlow, Batlow W, Bilbao, Buda, Davos, Devon
• All colormaps