Thermal

Summary

Thermal is a sequential colormap from cmocean. Lightness rises monotonically from 0.24 to 0.94, hue sweeps 240° from azure to chartreuse, and order holds under all three colorblind simulations.

Designed for sea surface temperature.

Perceptual profile (OKLCh)

• Lightness: 0.244 → 0.944 (range 0.700, min 0.244, max 0.944); monotonic; midpoint 0.588
• Chroma: min 0.047, max 0.180, mean 0.134
• Hue: 235.7° → 115.6° (span 239.9°), path monotonic-cw; quadrants: azure, blue, violet, magenta, rose, red, orange, yellow, chartreuse
• Endpoint temperature: cool → warm
• Perceptual ΔE: total 137.5, mean/step 0.539, max step 0.673, smoothness 0.798, speed 0.539

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 107.5; preserves order: yes
• Deuteranopia: ΔE total 105.8; preserves order: yes
• Tritanopia: ΔE total 121.7; preserves order: yes

Related

• Family: cmocean
• Source: Thyng, Greene, Hetland, Zimmerle, DiMarco 2016, Oceanography 29(3)
• Similar sequential maps: Algae, Amp, Deep, Dense, Gray, Haline, Ice, Matter
• All colormaps