Redshift

Summary

Redshift is a diverging colormap from cmasher. Two arms meet at a pivot of lightness 0.02, hue sweeps 194° from cyan to magenta, and order holds under all three colorblind simulations.

Astronomical blueshift↔redshift.

Perceptual profile (OKLCh)

• Lightness: 0.902 → 0.902 (range 0.878, min 0.025, max 0.902); non-monotonic; midpoint 0.025
• Chroma: min 0.001, max 0.167, mean 0.097
• Hue: 197.2° → 325.9° (span 194.1°), path monotonic-cw; quadrants: cyan, azure, blue, violet, orange, red, rose, magenta
• Pivot: t 0.498, lightness 0.025, hue jump 108.5°, smoothness 0.500
• Endpoint temperature: cool → cool
• Perceptual ΔE: total 186.9, mean/step 0.733, max step 1.240, smoothness 0.785, speed 0.733

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 166.5; preserves order: yes
• Deuteranopia: ΔE total 169.2; preserves order: yes
• Tritanopia: ΔE total 171.5; preserves order: yes

Related

• Family: cmasher
• Source: Ellert van der Velden — CMasher (10.21105/joss.02004)
• Similar diverging maps: Fusion, Guppy, Holly, Iceburn, Pride, Prinsenvlag, Seaweed, Viola
• All colormaps