# GMT drywet

Canonical URL: https://colorcurio.us/colormaps/ncar.GMT_drywet
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/GMT_drywet.rgb
Tags: cartographic, climate
Stops: 256

## Summary

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

NCL GMT_drywet land moisture ramp.

## Perceptual profile (OKLCh)

- Lightness: 0.537 → 0.332 (range 0.556, min 0.327, max 0.883); non-monotonic; midpoint 0.856
- Chroma: min 0.088, max 0.239, mean 0.156
- Hue: 75.6° → 260.9° (span 196.2°), path monotonic-cw; quadrants: yellow, chartreuse, green, mint, cyan, azure, blue, violet
- Endpoint temperature: warm → cool
- Perceptual ΔE: total 176.8, mean/step 0.693, max step 1.141, smoothness 0.639, speed 0.693

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 140.7; preserves order: no
- Deuteranopia: ΔE total 138.3; preserves order: yes
- Tritanopia: ΔE total 151.2; preserves order: no

## Related

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