# Earth (Plotly)

Canonical URL: https://colorcurio.us/colormaps/plotly.earth
Source type: Colormap
Type: sequential
Collection: plotly
Attribution: plotly.js / plotly.py contributors
License: MIT
Source: https://github.com/plotly/plotly.py/blob/main/_plotly_utils/colors/plotlyjs.py
Tags: cartographic, terrain, land-and-sea
Stops: 256

## Summary

Earth (Plotly) is a sequential colormap from the plotly collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

Plotly Earth ramp (distinct from carto.earth).

## Perceptual profile (OKLCh)

- Lightness: 0.274 → 1.000 (range 0.726, min 0.274, max 1.000); non-monotonic; midpoint 0.808
- Chroma: min 0.000, max 0.241, mean 0.141
- Hue: 264.1° → 0.0° (span 264.2°), path monotonic-ccw; quadrants: blue, azure, cyan, mint, green, chartreuse, yellow
- Endpoint temperature: cool → null
- Perceptual ΔE: total 231.3, mean/step 0.907, max step 1.633, smoothness 0.580, speed 0.907

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 204.8; preserves order: no
- Deuteranopia: ΔE total 201.4; preserves order: no
- Tritanopia: ΔE total 205.3; preserves order: no

## Related

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