Cold and Hot

Summary

Cold and Hot is a diverging colormap from paraview. Two arms meet at a pivot of lightness 0.32, hue sweeps 275° from cyan to chartreuse, and order holds under all three colorblind simulations.

Cyan↔red 5-point cold/hot diverging.

Perceptual profile (OKLCh)

• Lightness: 0.905 → 0.968 (range 0.702, min 0.266, max 0.968); non-monotonic; midpoint 0.279
• Chroma: min 0.145, max 0.313, mean 0.212
• Hue: 194.8° → 109.8° (span 275.0°), path monotonic-cw; quadrants: cyan, azure, blue, violet, magenta, rose, red, orange, yellow, chartreuse
• Pivot: t 0.518, lightness 0.323, hue jump 120.2°, smoothness 0.635
• Endpoint temperature: cool → warm
• Perceptual ΔE: total 223.4, mean/step 0.876, max step 7.351, smoothness 0.000, speed 0.876

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 182.2; preserves order: yes
• Deuteranopia: ΔE total 177.2; preserves order: yes
• Tritanopia: ΔE total 207.0; preserves order: yes

Related

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