# Spectral

Canonical URL: https://colorcurio.us/colormaps/matplotlib.Spectral
Source type: Colormap
Type: diverging
Collection: matplotlib
Attribution: ColorBrewer 2.0 (Brewer & Harrower) via matplotlib
License: Apache-2.0 (ColorBrewer)
Source: https://colorbrewer2.org/
Tags: colorbrewer
Stops: 256

## Summary

Spectral is a diverging colormap from the matplotlib collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

ColorBrewer 2.0 Spectral; 11 anchor stops.

## Perceptual profile (OKLCh)

- Lightness: 0.449 → 0.484 (range 0.535, min 0.449, max 0.984); non-monotonic; midpoint 0.984
- Chroma: min 0.082, max 0.186, mean 0.123
- Hue: 7.8° → 289.0° (span 281.2°), path monotonic-cw; quadrants: red, orange, yellow, chartreuse, green, mint, cyan, azure, blue, violet
- Endpoint temperature: warm → cool
- Perceptual ΔE: total 174.6, mean/step 0.684, max step 1.430, smoothness 0.577, speed 0.684

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 149.3; preserves order: yes
- Deuteranopia: ΔE total 132.2; preserves order: yes
- Tritanopia: ΔE total 147.2; preserves order: yes

## Related

- Family: https://colorcurio.us/colormaps/families/matplotlib
- All colormaps: https://colorcurio.us/colormaps