Browse by palette
Explore Soil, Gley and Geological Rock collections, including 115 Geological Rock entries, or open All Colours across 483 unique Munsell identities.
Field colour reference, without the bulky chart.
GeoColour puts a fast, searchable Munsell colour reference in your pocket. Browse soil, Gley and geological rock palettes, compare swatches, and search by Munsell notation, description or HEX value.
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Built for the field
A focused reference experience for geologists, soil professionals, environmental scientists and students who need colour information quickly.
Fast colour search
Search by Munsell notation, descriptive colour name or HEX value.
Clear colour details
Tap any swatch to view its notation, palette-specific descriptions, and digital RGB and HEX information, or copy the details.
Works offline
Colour data stays on your iPhone. No account and no internet connection required to browse or search.
Important notes
GeoColour is a convenient visual reference and is not a calibrated colour-measurement instrument. Colour appearance can vary with screen calibration, brightness, ambient light and device settings. Where accuracy is critical, verify colours using an appropriate physical reference or calibrated instrument.
GeoColour is an independent application and is not affiliated with or endorsed by Pantone, X-Rite or Munsell.