# Broc

Canonical URL: https://colorcurio.us/colormaps/crameri.broc
Source type: Colormap
Type: diverging
Collection: crameri
Attribution: Crameri 2018, Scientific Colour Maps (https://www.fabiocrameri.ch/colourmaps/)
License: CC-BY-4.0
Source: https://www.fabiocrameri.ch/colourmaps/
Tags: scientific, perceptually-uniform, blue-yellow
Stops: 256

## Summary

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

Diverging. Sourced from ScientificColourMaps8/broc/broc.txt.

## Perceptual profile (OKLCh)

- Lightness: 0.270 → 0.262 (range 0.688, min 0.262, max 0.950); non-monotonic; midpoint 0.946
- Chroma: min 0.004, max 0.094, mean 0.062
- Hue: 296.1° → 109.9° (span 189.3°), path monotonic-ccw; quadrants: violet, blue, chartreuse
- Endpoint temperature: cool → neutral
- Perceptual ΔE: total 150.3, mean/step 0.590, max step 0.766, smoothness 0.869, speed 0.590

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 144.0; preserves order: yes
- Deuteranopia: ΔE total 143.8; preserves order: yes
- Tritanopia: ΔE total 151.0; preserves order: yes

## Related

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