Gnuplot

Summary

Gnuplot is a sequential colormap from matplotlib. Lightness spans 0.00–0.97, hue sweeps 178° from rose to chartreuse, and order breaks under protan, deutan, and tritan simulation.

Classic gnuplot RGB-formula ramp.

Perceptual profile (OKLCh)

• Lightness: 0.000 → 0.968 (range 0.968, min 0.000, max 0.968); non-monotonic; midpoint 0.497
• Chroma: min 0.000, max 0.292, mean 0.198
• Hue: 0.0° → 109.8° (span 178.5°), path monotonic-cw; quadrants: rose, magenta, violet, red, orange, yellow, chartreuse
• Endpoint temperature: null → warm
• Perceptual ΔE: total 186.5, mean/step 0.732, max step 6.831, smoothness 0.070, speed 0.732

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 173.0; preserves order: no
• Deuteranopia: ΔE total 158.5; preserves order: no
• Tritanopia: ΔE total 178.8; preserves order: no

Related

• Family: matplotlib
• Source: matplotlib developers
• Similar sequential maps: AFM Hot, Bone, BRG, Cividis, Copper, Cubehelix, Gist Earth, Gist NCAR
• All colormaps