# Medium Contrast

Canonical URL: https://colorcurio.us/colormaps/tol.medium_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, medium-contrast
Stops: 8

## Summary

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

8-class medium-contrast qualitative palette.

## Perceptual profile (OKLCh)

- Lightness: 0.668 → 0.000 (range 1.000, min 0.000, max 1.000); non-monotonic; midpoint 0.586
- Chroma: min 0.000, max 0.129, mean 0.086
- Hue: 249.4° → 0.0° (span 254.9°), path folded; quadrants: blue, chartreuse, yellow, red
- Endpoint temperature: cool → null
- Perceptual ΔE: total 352.5, mean/step 50.354, max step 100.000, smoothness 0.501, speed 1.000

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 340.6; preserves order: no
- Deuteranopia: ΔE total 329.3; preserves order: no
- Tritanopia: ΔE total 320.0; preserves order: no

## Related

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