# Topo

Canonical URL: https://colorcurio.us/colormaps/cmocean.topo
Source type: Colormap
Type: multi-sequential
Collection: cmocean
Attribution: Thyng, Greene, Hetland, Zimmerle, DiMarco 2016, Oceanography 29(3)
License: MIT
Source: https://matplotlib.org/cmocean/
Tags: oceanography, topographic, land-and-sea
Stops: 256

## Summary

Topo is a multi-sequential colormap from the cmocean collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

Designed for topography/bathymetry; sea ramp + land ramp meet at zero.

## Perceptual profile (OKLCh)

- Lightness: 0.244 → 0.985 (range 0.745, min 0.240, max 0.985); non-monotonic; midpoint 0.980
- Chroma: min 0.033, max 0.115, mean 0.081
- Hue: 318.0° → 115.7° (span 235.8°), path folded; quadrants: magenta, violet, blue, azure, cyan, mint, green, chartreuse, yellow
- Endpoint temperature: neutral → neutral
- Perceptual ΔE: total 274.9, mean/step 1.078, max step 81.628, smoothness 0.000, speed 1.000

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 246.6; preserves order: no
- Deuteranopia: ΔE total 250.4; preserves order: no
- Tritanopia: ΔE total 282.8; preserves order: no

## Related

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