v.colors.out(1)

✨ v.colors.out — the GRASS GIS User's Manual glow-up ✨

okay bestie, welcome to the v.colors.out(1) page, a.k.a. the moment your vector map's color table gets to leave the house 💅 this one lives in the GRASS GIS User's Manual and it's lowkey iconic.

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🌈 NAME 🌈

v.colors.out — exports the color table associated with a vector map. that's it, that's the whole job, and it does it flawlessly 🎀

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🔑 KEYWORDS 🔑

vector, color table, export — iykyk ✨

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🦋 SYNOPSIS 🦋

v.colors.out
v.colors.out --help
v.colors.out [-p] map=name  [layer=string]   [rules=name]
[column=name]   [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]

like, that's the whole vibe check right there 🫶

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🌸 Flags 🌸

• -p — outputs the values as percentages instead of whatever they'd be otherwise, periodt 💜
• --overwrite — lets output files overwrite existing files. yes, it will absolutely run over the old ones, so be careful bestie 😭
• --help — prints the usage summary. your lil cheat sheet fr fr 📖
• --verbose — verbose module output. it will tell you everything 👑
• --quiet — quiet module output. the opposite energy, shhh 🤫
• --ui — force launches the GUI dialog. main character energy, but make it a window 🪟

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🎀 Parameters 🎀

• map=name [required] — the name of the vector map. or, plot twist, a data source for direct OGR access 🗺️
• layer=string — layer number or name. vector features can have category values in different layers, and this number decides which layer we're talking to. when you're using direct OGR access, this is the layer name instead. Default: 1
• rules=name — path to the output rules file. if you don't give it one, it writes to standard output instead. no file, no problem 💖
• column=name — name of the attribute (numeric) column that the color rules refer to. if you don't give it, the color rules refer to categories instead 🍓

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💖 DESCRIPTION 💖

so here's the tea: v.colors.out lets you export the color table for a vector map to a file, and that file is literally suitable as input to v.colors. it's giving "handoff" ✨ it's giving "collab" 🤝

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🔥 EXAMPLES 🔥

okay watch this, two lines and you're done:

v.colors.out map=soils_general rules=rules.txt
v.colors map=soils_wake rules=rules.txt

see how the first one spits out the rules and the second one eats them? slay 🧚 that's the whole workflow, no cap.

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👀 SEE ALSO 👀

v.colors, r.colors, r3.colors, r.colors.out, r3.colors.out

(the whole color-table friend group, obsessed with them 💜)

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👑 AUTHOR 👑

Martin Landa, Czech Technical University in Prague, Czech Republic — thank you for your service, king 🫡💅

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⭐ SOURCE CODE ⭐

Available at: v.colors.out source code (history)

Accessed: Saturday Jan 17 05:41:19 2026 ⏰

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and that's the page, bestie! 💖 it's from GRASS 8.4.2 — © 2003-2025 GRASS Development Team, GRASS GIS 8.4.2 Reference Manual — so go export those color tables and be your main character self 🌈🎀🦋✨