color-eyre
Enhanced error reporting library for Rust with colorized terminal output, backtraces, spantrace (tracing context), and custom sections in error reports. Built on eyre (the anyhow alternative). Provides the install() hook that replaces the default Rust panic handler with a beautiful, colored diagnostic. Used in CLI tools and applications where error messages need to be human-readable.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Error reporting library. Be careful not to include sensitive data in error reports — credentials or PII in error context should be redacted.
⚡ Reliability
Best When
You're building Rust CLI tools or applications where human-readable, colorized error output significantly improves developer/user experience.
Avoid When
You're writing a library (use thiserror) or need structured machine-readable errors for log aggregation (use custom error types with serde).
Use Cases
- • Produce beautiful, colorized error reports in Rust CLI tools with backtraces and custom context sections
- • Add rich diagnostic context to agent errors including tracing spans for debugging distributed system failures
- • Install color-eyre's panic hook for beautiful panic output in Rust binaries instead of the default cryptic backtrace
- • Wrap errors with human-readable context using .wrap_err() while preserving the original error for debugging
- • Generate structured error reports in Rust applications with custom sections for agent state or request context
Not For
- • Library code where error type flexibility is needed — use thiserror for library error types; color-eyre is for application-level reporting
- • Performance-critical hot paths — color-eyre adds formatting overhead; use plain errors in tight loops
- • Production log aggregation needing structured JSON errors — use serde-serializable error types or structured logging libraries
Interface
Authentication
Error handling library. No authentication required.
Pricing
MIT and Apache 2.0 dual license.
Agent Metadata
Known Gotchas
- ⚠ color_eyre::install() must be called once at program start before any errors are created — calling it multiple times panics
- ⚠ color-eyre uses eyre::Report type not anyhow::Error — code using anyhow cannot directly use color-eyre reports without switching the error type
- ⚠ Backtrace capture requires RUST_BACKTRACE=1 or RUST_LIB_BACKTRACE=1 env vars — not automatic for performance reasons
- ⚠ SpanTrace (tracing context) requires the tracing-error feature and tracing crate — additional setup needed for span-aware error reports
- ⚠ color-eyre output goes to stderr — if capturing stderr programmatically, colored ANSI codes may appear in captured output; disable with NO_COLOR env var
- ⚠ Custom sections (Section trait) require implementing eyre's API — adding structured diagnostic sections has a learning curve
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for color-eyre.
Scores are editorial opinions as of 2026-03-06.