Diverging rainbow

Summary

Diverging rainbow is a diverging colormap from colorcet. Two arms meet at a pivot of lightness 0.86, hue sweeps 270° from blue to rose, and order breaks under protan, deutan, and tritan simulation.

Perceptual profile (OKLCh)

• Lightness: 0.540 → 0.553 (range 0.315, min 0.540, max 0.855); non-monotonic; midpoint 0.855
• Chroma: min 0.091, max 0.243, mean 0.174
• Hue: 262.1° → 29.4° (span 269.7°), path monotonic-ccw; quadrants: blue, azure, cyan, mint, green, chartreuse, yellow, orange, red, rose
• Pivot: t 0.502, lightness 0.855, hue jump 9.8°, smoothness 0.951
• Endpoint temperature: cool → warm
• Perceptual ΔE: total 201.6, mean/step 0.790, max step 2.285, smoothness 0.470, speed 0.790

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 182.3; preserves order: no
• Deuteranopia: ΔE total 160.0; preserves order: no
• Tritanopia: ΔE total 120.8; preserves order: no

Related

• Family: colorcet
• Source: Kovesi 2015 — "Good Colour Maps: How to Design Them" (arXiv:1509.03700)
• Similar diverging maps: Bjr, Bjy, Bkr, Bky, CB-Bwy, CB-Cwr, CET-D1, Gkr
• All colormaps