# Iridescent

Canonical URL: https://colorcurio.us/colormaps/tol.iridescent
Source type: Colormap
Type: sequential
Collection: tol
Attribution: Paul Tol, "Colour Schemes" (SRON/EPS/TN/09-002)
License: BSD-3-Clause
Source: https://sronpersonalpages.nl/~pault/
Tags: cvd-friendly, light-start
Stops: 256

## Summary

Iridescent is a sequential colormap from the tol collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

Sequential pastel-to-purple; CVD-friendly.

## Perceptual profile (OKLCh)

- Lightness: 0.986 → 0.350 (range 0.636, min 0.350, max 0.986); monotonic; midpoint 0.789
- Chroma: min 0.024, max 0.091, mean 0.066
- Hue: 99.1° → 359.1° (span 260.0°), path monotonic-cw; quadrants: chartreuse, green, mint, cyan, azure, blue, violet, magenta, rose
- Endpoint temperature: neutral → warm
- Perceptual ΔE: total 118.0, mean/step 0.463, max step 0.896, smoothness 0.705, speed 0.463

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 99.4; preserves order: yes
- Deuteranopia: ΔE total 98.4; preserves order: yes
- Tritanopia: ΔE total 117.8; preserves order: yes

## Related

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