NCL temp 19lev

Summary

NCL temp 19lev is a sequential colormap from ncar. Lightness spans 0.24–0.98, hue sweeps 186° from blue to orange, and order holds under all three colorblind simulations.

NCL temperature magnitude ramp.

Perceptual profile (OKLCh)

• Lightness: 0.245 → 0.305 (range 0.738, min 0.245, max 0.983); non-monotonic; midpoint 0.976
• Chroma: min 0.005, max 0.218, mean 0.108
• Hue: 260.5° → 29.2° (span 186.3°), path folded; quadrants: blue, azure, red, orange
• Endpoint temperature: cool → warm
• Perceptual ΔE: total 174.5, mean/step 0.684, max step 1.034, smoothness 0.733, speed 0.684

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 152.7; preserves order: yes
• Deuteranopia: ΔE total 154.7; preserves order: yes
• Tritanopia: ΔE total 174.9; preserves order: yes

Related

• Family: ncar
• Source: NCL/NCAR — UCAR (via hhuangwx/cmaps MIT wrapper)
• Similar sequential maps: NCL CBR drywet, NCL CBR wet, GMT drywet, GMT topo, MPL terrain (NCL), NCL precip 15lev, NCL topo 15lev, NCL wind 17lev
• All colormaps