# Category 10

Canonical URL: https://colorcurio.us/colormaps/d3.category10
Source type: Colormap
Type: categorical
Collection: d3
Attribution: d3-scale-chromatic (Mike Bostock and contributors)
License: ISC
Source: https://github.com/d3/d3-scale-chromatic/blob/main/src/categorical/category10.js
Tags: categorical, choropleth
Stops: 10

## Summary

Category 10 is a categorical colormap from the d3 collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

D3 classic default qualitative palette.

## Perceptual profile (OKLCh)

- Lightness: 0.549 → 0.733 (range 0.262, min 0.511, max 0.773); non-monotonic; midpoint 0.596
- Chroma: min 0.000, max 0.209, mean 0.135
- Hue: 244.6° → 206.4° (span 321.8°), path folded; quadrants: blue, orange, green, red, magenta, rose, chartreuse, cyan
- Endpoint temperature: cool → cool
- Perceptual ΔE: total 380.1, mean/step 42.236, max step 71.828, smoothness 0.670, speed 1.000

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 288.6; preserves order: no
- Deuteranopia: ΔE total 295.6; preserves order: no
- Tritanopia: ΔE total 344.5; preserves order: no

## Related

- Family: https://colorcurio.us/colormaps/families/d3
- All colormaps: https://colorcurio.us/colormaps