# RdYlBu

Canonical URL: https://colorcurio.us/colormaps/colorbrewer.RdYlBu
Source type: Colormap
Type: diverging
Collection: colorbrewer
Attribution: Cynthia Brewer & Mark Harrower, ColorBrewer 2.0
License: Apache-2.0
Source: https://colorbrewer2.org/
Tags: diverging, colorbrewer, red-yellow-blue
Stops: 256

## Summary

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

ColorBrewer 2.0 diverging 'RdYlBu' (11-class anchors).

## Perceptual profile (OKLCh)

- Lightness: 0.456 → 0.391 (range 0.593, min 0.391, max 0.984); non-monotonic; midpoint 0.984
- Chroma: min 0.018, max 0.204, mean 0.112
- Hue: 20.8° → 274.5° (span 253.7°), path monotonic-cw; quadrants: red, orange, yellow, chartreuse, green, mint, azure, blue, violet
- Endpoint temperature: warm → cool
- Perceptual ΔE: total 163.0, mean/step 0.639, max step 1.220, smoothness 0.717, speed 0.639

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 145.6; preserves order: yes
- Deuteranopia: ΔE total 136.7; preserves order: yes
- Tritanopia: ΔE total 143.9; preserves order: yes

## Related

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