Enable colored CLI output in Rust by setting RUSTC_COLOR=always or using the --color=always flag with cargo and rustc commands.
Enable colored output in Rust CLI tools by setting the RUSTC_COLOR environment variable or using the --color flag.
export RUSTC_COLOR=always
rustc --explain E0001
For cargo commands, use the --color flag directly:
cargo build --color=always
The rustc compiler uses the ColorConfig enum (found in rustc_errors) to determine output styling, supporting Auto, Always, and Never modes.
Adding colored output to CLI forces your command-line tools to use colored text for errors and warnings, making them easier to read. It works like turning on 'highlights' in a document so you can spot important information quickly. You use it when your terminal supports colors but the tool defaults to plain text.