# Vlag

Canonical URL: https://colorcurio.us/colormaps/seaborn.vlag
Source type: Colormap
Type: diverging
Collection: seaborn
Attribution: Michael Waskom, seaborn (BSD-3); rocket/mako/flare/crest/vlag/icefire LUTs from seaborn/cm.py
License: BSD-3-Clause
Source: https://seaborn.pydata.org/tutorial/color_palettes.html
Tags: diverging, blue-red, cvd-friendly
Stops: 256

## Summary

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

seaborn 'vlag' (diverging blue→white→red)

## Perceptual profile (OKLCh)

- Lightness: 0.524 → 0.503 (range 0.471, min 0.503, max 0.975); non-monotonic; midpoint 0.975
- Chroma: min 0.004, max 0.149, mean 0.065
- Hue: 255.4° → 22.3° (span 134.3°), path monotonic-cw; quadrants: blue, red
- Endpoint temperature: cool → warm
- Perceptual ΔE: total 103.3, mean/step 0.405, max step 0.465, smoothness 0.885, speed 0.405

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 97.4; preserves order: yes
- Deuteranopia: ΔE total 97.0; preserves order: yes
- Tritanopia: ΔE total 105.9; preserves order: yes

## Related

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