# BatlowK

Canonical URL: https://colorcurio.us/colormaps/crameri.batlowK
Source type: Colormap
Type: sequential
Collection: crameri
Attribution: Crameri 2018, Scientific Colour Maps (https://www.fabiocrameri.ch/colourmaps/)
License: CC-BY-4.0
Source: https://www.fabiocrameri.ch/colourmaps/
Tags: scientific, perceptually-uniform, dark-start
Stops: 256

## Summary

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

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: https://colorcurio.us/colormaps/families/crameri
- All colormaps: https://colorcurio.us/colormaps