# Redshift

Canonical URL: https://colorcurio.us/colormaps/cmasher.redshift
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/redshift/redshift_norm.txt
Tags: perceptually-uniform, diverging
Stops: 256

## Summary

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

Astronomical blueshift↔redshift.

## Perceptual profile (OKLCh)

- Lightness: 0.902 → 0.902 (range 0.878, min 0.025, max 0.902); non-monotonic; midpoint 0.025
- Chroma: min 0.001, max 0.167, mean 0.097
- Hue: 197.2° → 325.9° (span 194.1°), path monotonic-cw; quadrants: cyan, azure, blue, violet, orange, red, rose, magenta
- Endpoint temperature: cool → cool
- Perceptual ΔE: total 186.9, mean/step 0.733, max step 1.240, smoothness 0.785, speed 0.733

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 166.5; preserves order: yes
- Deuteranopia: ΔE total 169.2; preserves order: yes
- Tritanopia: ΔE total 171.5; preserves order: yes

## Related

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