Terrain

Summary

Terrain is a sequential colormap from matplotlib. Lightness spans 0.39–1.00, hue sweeps 276° from violet to orange, and order breaks under protan, deutan, and tritan simulation.

matplotlib default GIS ramp; blue→green→tan→white.

Perceptual profile (OKLCh)

• Lightness: 0.391 → 1.000 (range 0.609, min 0.391, max 1.000); non-monotonic; midpoint 0.976
• Chroma: min 0.000, max 0.197, mean 0.107
• Hue: 275.9° → 0.0° (span 275.9°), path monotonic-ccw; quadrants: violet, blue, azure, cyan, mint, green, chartreuse, yellow, orange
• Endpoint temperature: cool → null
• Perceptual ΔE: total 221.1, mean/step 0.867, max step 3.016, smoothness 0.401, speed 0.867

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 198.3; preserves order: no
• Deuteranopia: ΔE total 192.5; preserves order: no
• Tritanopia: ΔE total 187.1; preserves order: no

Related

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