Cubehelix

Summary

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

Dave Green 2011 astronomy ramp; black→bright.

Perceptual profile (OKLCh)

• Lightness: 0.000 → 1.000 (range 1.000, min 0.000, max 1.000); monotonic; midpoint 0.602
• Chroma: min 0.000, max 0.117, mean 0.069
• Hue: 0.0° → 0.0° (span 360.0°), path monotonic-ccw; quadrants: magenta, violet, blue, azure, cyan, mint, green, chartreuse, yellow, orange, red, rose
• Endpoint temperature: null → null
• Perceptual ΔE: total 209.6, mean/step 0.822, max step 1.326, smoothness 0.690, speed 0.822

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 147.3; preserves order: yes
• Deuteranopia: ΔE total 141.3; preserves order: yes
• Tritanopia: ΔE total 174.8; preserves order: yes

Related

• Family: matplotlib
• Source: matplotlib developers
• Similar sequential maps: AFM Hot, Bone, BRG, Cividis, Copper, Gist Earth, Gist NCAR, Gnuplot
• All colormaps