Gouldian

Summary

Gouldian is a sequential colormap from colorcet. Lightness rises monotonically from 0.22 to 0.98, hue sweeps 206° from magenta to chartreuse, and order holds under all three colorblind simulations.

Perceptual profile (OKLCh)

• Lightness: 0.224 → 0.983 (range 0.759, min 0.224, max 0.983); monotonic; midpoint 0.588
• Chroma: min 0.000, max 0.214, mean 0.155
• Hue: 174.6° → 179.0° (span 205.8°), path folded; quadrants: magenta, violet, blue, azure, cyan, mint, green, chartreuse
• Endpoint temperature: null → null
• Perceptual ΔE: total 186.0, mean/step 0.730, max step 6.831, smoothness 0.019, speed 0.730

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 162.9; preserves order: yes
• Deuteranopia: ΔE total 162.7; preserves order: yes
• Tritanopia: ΔE total 132.4; preserves order: yes

Related

• Family: colorcet
• Source: Kovesi 2015 — "Good Colour Maps: How to Design Them" (arXiv:1509.03700)
• Similar sequential maps: Bgy, Bgyw, Blues (perceptual), Bmw, Bmy, CB-Kbw, CB-Kyw, CB-Kcw
• All colormaps