# NCL topo 15lev

Canonical URL: https://colorcurio.us/colormaps/ncar.topo_15lev
Source type: Colormap
Type: sequential
Collection: ncar
Attribution: NCL/NCAR — UCAR (via hhuangwx/cmaps MIT wrapper)
License: MIT (wrapper) / public-domain (data)
Source: https://raw.githubusercontent.com/hhuangwx/cmaps/master/cmaps/colormaps/ncar_ncl/topo_15lev.rgb
Tags: cartographic, terrain
Stops: 256

## Summary

NCL topo 15lev is a sequential colormap from the ncar collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

NCL discrete topographic ramp.

## Perceptual profile (OKLCh)

- Lightness: 0.391 → 1.000 (range 0.610, min 0.391, max 1.000); non-monotonic; midpoint 0.699
- Chroma: min 0.000, max 0.232, mean 0.095
- Hue: 270.6° → 0.0° (span 270.6°), path folded; quadrants: violet, green, mint, chartreuse, yellow, orange
- Endpoint temperature: cool → null
- Perceptual ΔE: total 200.8, mean/step 0.787, max step 71.717, smoothness 0.000, speed 0.787

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 181.1; preserves order: no
- Deuteranopia: ΔE total 173.8; preserves order: no
- Tritanopia: ΔE total 183.0; preserves order: no

## Related

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