ERDC Purple-to-Green

Summary

ERDC Purple-to-Green is a diverging colormap from paraview. Two arms meet at a pivot of lightness 0.63, hue sweeps 183° from violet to green, and order holds under all three colorblind simulations.

ERDC SciVis purple↔green diverging.

Perceptual profile (OKLCh)

• Lightness: 0.333 → 0.942 (range 0.609, min 0.333, max 0.942); monotonic; midpoint 0.632
• Chroma: min 0.000, max 0.176, mean 0.101
• Hue: 290.1° → 126.2° (span 182.9°), path monotonic-ccw; quadrants: violet, magenta, green
• Pivot: t 0.498, lightness 0.632, hue jump 179.4°, smoothness 0.990
• Endpoint temperature: cool → warm
• Perceptual ΔE: total 93.6, mean/step 0.367, max step 0.916, smoothness 0.531, speed 0.367

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 85.0; preserves order: yes
• Deuteranopia: ΔE total 83.0; preserves order: yes
• Tritanopia: ΔE total 78.3; preserves order: yes

Related

• Family: paraview
• Source: ParaView / VTK — Kitware (presets curated by Moreland, Samsel et al.)
• Similar diverging maps: Blue Orange (div), Cold and Hot, Cool to Warm, Cool to Warm (Extended), ERDC DivHi PurpleGreen, ERDC DivLow IcePeach, ERDC DivLow PurpleGreen, ERDC Icefire (H)
• All colormaps