# Amethyst

Canonical URL: https://colorcurio.us/colormaps/cmasher.amethyst
Source type: Colormap
Type: sequential
Collection: cmasher
Attribution: Ellert van der Velden — CMasher (10.21105/joss.02004)
License: BSD-3
Source: https://raw.githubusercontent.com/1313e/CMasher/master/src/cmasher/colormaps/amethyst/amethyst_norm.txt
Tags: perceptually-uniform, sequential
Stops: 256

## Summary

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

Black→violet, dark-bg sequential.

## Perceptual profile (OKLCh)

- Lightness: 0.000 → 1.000 (range 1.000, min 0.000, max 1.000); monotonic; midpoint 0.566
- Chroma: min 0.000, max 0.235, mean 0.093
- Hue: 0.0° → 0.0° (span 360.0°), path monotonic-ccw; quadrants: magenta, violet, blue, azure, cyan, mint
- Endpoint temperature: null → null
- Perceptual ΔE: total 120.6, mean/step 0.473, max step 0.795, smoothness 0.785, speed 0.473

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 104.7; preserves order: yes
- Deuteranopia: ΔE total 102.3; preserves order: yes
- Tritanopia: ΔE total 107.4; preserves order: yes

## Related

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