# ERDC Rainbow (dark)

Canonical URL: https://colorcurio.us/colormaps/paraview.erdc-rainbow-dark
Source type: Colormap
Type: sequential
Collection: paraview
Attribution: ParaView / VTK — Kitware (presets curated by Moreland, Samsel et al.)
License: BSD-3
Source: https://raw.githubusercontent.com/Kitware/ParaView/master/Remoting/Views/ColorMaps.json
Tags: rainbow, dark-bg
Stops: 256

## Summary

ERDC Rainbow (dark) is a sequential colormap from the paraview collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

ERDC SciVis dark-bg rainbow.

## Perceptual profile (OKLCh)

- Lightness: 0.240 → 0.651 (range 0.562, min 0.240, max 0.802); non-monotonic; midpoint 0.708
- Chroma: min 0.104, max 0.223, mean 0.170
- Hue: 264.1° → 25.0° (span 239.2°), path monotonic-ccw; quadrants: blue, azure, cyan, mint, green, chartreuse, yellow, orange, red
- Endpoint temperature: cool → warm
- Perceptual ΔE: total 178.8, mean/step 0.701, max step 1.525, smoothness 0.640, speed 0.701

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 126.3; preserves order: yes
- Deuteranopia: ΔE total 111.6; preserves order: no
- Tritanopia: ΔE total 135.3; preserves order: yes

## Related

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