# Dark

Canonical URL: https://colorcurio.us/colormaps/tol.dark
Source type: Colormap
Type: categorical
Collection: tol
Attribution: Paul Tol, "Colour Schemes" (SRON/EPS/TN/09-002)
License: BSD-3-Clause
Source: https://sronpersonalpages.nl/~pault/
Tags: categorical, dark, annotation
Stops: 6

## Summary

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

6-class dark qualitative palette (text/foreground).

## Perceptual profile (OKLCh)

- Lightness: 0.284 → 0.450 (range 0.214, min 0.284, max 0.498); non-monotonic; midpoint 0.402
- Chroma: min 0.000, max 0.098, mean 0.065
- Hue: 279.0° → 0.0° (span 276.3°), path folded; quadrants: violet, red, green, chartreuse, cyan
- Endpoint temperature: cool → null
- Perceptual ΔE: total 125.2, mean/step 25.032, max step 42.669, smoothness 0.611, speed 1.000

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 72.8; preserves order: no
- Deuteranopia: ΔE total 81.5; preserves order: no
- Tritanopia: ΔE total 154.7; preserves order: no

## Related

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