# Viola

Canonical URL: https://colorcurio.us/colormaps/cmasher.viola
Source type: Colormap
Type: diverging
Collection: cmasher
Attribution: Ellert van der Velden — CMasher (10.21105/joss.02004)
License: BSD-3
Source: https://raw.githubusercontent.com/1313e/CMasher/master/src/cmasher/colormaps/viola/viola_norm.txt
Tags: perceptually-uniform, diverging
Stops: 256

## Summary

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

Purple-yellow diverging.

## Perceptual profile (OKLCh)

- Lightness: 0.193 → 0.185 (range 0.811, min 0.185, max 0.996); non-monotonic; midpoint 0.996
- Chroma: min 0.001, max 0.197, mean 0.104
- Hue: 303.6° → 11.2° (span 175.3°), path folded; quadrants: magenta, violet, blue, azure, cyan, rose, red
- Endpoint temperature: cool → warm
- Perceptual ΔE: total 201.8, mean/step 0.791, max step 1.155, smoothness 0.904, speed 0.791

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 176.3; preserves order: yes
- Deuteranopia: ΔE total 174.6; preserves order: yes
- Tritanopia: ΔE total 205.2; preserves order: yes

## Related

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