Isolum CGO 70
Summary
Isolum CGO 70 is a sequential colormap from colorcet. Lightness spans 0.73–0.75, hue sweeps 191° from azure to orange, and order breaks under tritan simulation.
Perceptual profile (OKLCh)
- Lightness: 0.734 → 0.755 (range 0.025, min 0.729, max 0.755); non-monotonic; midpoint 0.731
- Chroma: min 0.094, max 0.134, mean 0.106
- Hue: 230.8° → 39.7° (span 191.1°), path monotonic-ccw; quadrants: azure, cyan, mint, green, chartreuse, yellow, orange
- Endpoint temperature: cool → warm
- Perceptual ΔE: total 86.5, mean/step 0.339, max step 0.396, smoothness 0.883, speed 0.339
Colorblind safety (ΔE under simulated CVD)
- Protanopia: ΔE total 51.1; preserves order: yes
- Deuteranopia: ΔE total 49.1; preserves order: yes
- Tritanopia: ΔE total 65.9; 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