# High Contrast

Canonical URL: https://colorcurio.us/colormaps/tol.high_contrast
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, cvd-friendly, high-contrast
Stops: 5

## Summary

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

5-class high-contrast qualitative palette.

## Perceptual profile (OKLCh)

- Lightness: 0.000 → 1.000 (range 1.000, min 0.000, max 1.000); monotonic; midpoint 0.582
- Chroma: min 0.000, max 0.141, mean 0.080
- Hue: 0.0° → 0.0° (span 189.1°), path monotonic-cw; quadrants: blue, red, yellow
- Endpoint temperature: null → null
- Perceptual ΔE: total 144.8, mean/step 36.207, max step 44.666, smoothness 0.834, speed 1.000

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 124.2; preserves order: yes
- Deuteranopia: ΔE total 128.7; preserves order: yes
- Tritanopia: ΔE total 131.7; preserves order: yes

## Related

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