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ansi-recolor

v0.9.3

Published

Transform ANSI Color Sequences of TUI Applications

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Links

Maintainers

rserse

Keywords

ansicolorrecolortransformtui

Readme

ANSI Recolor

Transform ANSI Color Sequences of TUI Applications

github (author stars) github (author followers)

Abstract

ansi-recolor, Transform ANSI Color Sequences of TUI Applications, is a small command-line tool to intercept and transform the ANSI Select Graphic Rendition (SGR) color escape sequences emitted by Terminal User Interface (TUI) applications. It spawns the target command inside a Pseudo-Terminal (PTY), intercepts the output byte stream, rewrites foreground and background colors according to a declarative configuration file, and writes the transformed output to the real terminal.

This allows the end-user to adjust or completely remap the color palette of any terminal application without modifying the application itself. It supports the ANSI basic 8 colors, bright 8 colors, the 256-color palette, and RGB/truecolor -- including optional pre-mapping of RGB/truecolor to the nearest 256-color palette entry for easier mapping of RGB/truecolor colors.

ansi-recolor was developed in April 2026 as a tool to customize the color output of TUI applications without requiring re-configuration or even code changes to the applications themselves. In particular, it was motivated by applying a unobtrusive and less colorful color theme to Claude Code without the need of patching Claude Code (with tools like TweakCC), as this regularly failed for new versions of Claude Code.

Installation

$ npm install -g ansi-recolor

Usage

See the Unix manual page for the documentation of the ansi-recolor command.

License

Copyright © 2026 Dr. Ralf S. Engelschall (http://engelschall.com/) Licensed under MIT