# Copper (cyclic)

Canonical URL: https://colorcurio.us/colormaps/cmasher.copper
Source type: Colormap
Type: cyclic
Collection: cmasher
Attribution: Ellert van der Velden — CMasher (10.21105/joss.02004)
License: BSD-3
Source: https://raw.githubusercontent.com/1313e/CMasher/master/src/cmasher/colormaps/copper/copper_norm.txt
Tags: perceptually-uniform, cyclic
Stops: 256

## Summary

Copper (cyclic) is a cyclic colormap from the cmasher collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

Cyclic warm-copper cycle.

## Perceptual profile (OKLCh)

- Lightness: 0.000 → 0.025 (range 0.945, min 0.000, max 0.945); non-monotonic; midpoint 0.942
- Chroma: min 0.000, max 0.074, mean 0.047
- Hue: 0.0° → 326.7° (span 360.0°), path monotonic-ccw; quadrants: blue, azure, cyan, mint, green, chartreuse, yellow, orange, red, rose, magenta
- Endpoint temperature: null → null
- Perceptual ΔE: total 185.8, mean/step 0.729, max step 1.103, smoothness 0.791, speed 0.729

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 165.1; preserves order: yes
- Deuteranopia: ΔE total 165.0; preserves order: yes
- Tritanopia: ΔE total 178.5; preserves order: yes

## Related

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