Amethyst

Summary

Amethyst is a sequential colormap from cmasher. Lightness rises monotonically from 0.00 to 1.00, hue sweeps 360° from magenta to mint, and order holds under all three colorblind simulations.

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: cmasher
• Source: Ellert van der Velden — CMasher (10.21105/joss.02004)
• Similar sequential maps: Amber, Apple, Arctic, Bubblegum, Chroma, Cosmic, Dusk, Eclipse
• All colormaps