Isolum CM 70

Summary

Isolum CM 70 is a sequential colormap from colorcet. Lightness rises monotonically from 0.73 to 0.76, hue sweeps 137° from azure to red, and order breaks under tritan simulation.

Perceptual profile (OKLCh)

• Lightness: 0.732 → 0.761 (range 0.029, min 0.732, max 0.761); monotonic; midpoint 0.749
• Chroma: min 0.097, max 0.152, mean 0.113
• Hue: 223.4° → 0.3° (span 136.8°), path monotonic-cw; quadrants: azure, blue, violet, magenta, rose, red
• Endpoint temperature: cool → warm
• Perceptual ΔE: total 55.3, mean/step 0.217, max step 0.281, smoothness 0.810, speed 0.217

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 17.8; preserves order: yes
• Deuteranopia: ΔE total 28.3; preserves order: yes
• Tritanopia: ΔE total 63.8; preserves order: no

Related

• Family: colorcet
• Source: Kovesi 2015 — "Good Colour Maps: How to Design Them" (arXiv:1509.03700)
• Similar sequential maps: Bgy, Bgyw, Blues (perceptual), Bmw, Bmy, CB-Kbw, CB-Kyw, CB-Kcw
• All colormaps