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claude-code - 💡(How to fix) Fix [BUG] v2.1.110 — All colors render as single monotone color in macOS Terminal.app regardless of /theme setting [2 comments, 2 participants]

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anthropics/claude-code#49089•Fetched 2026-04-17 08:51:12
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After auto-updating to v2.1.110, Claude Code renders all UI text in a single color (no color differentiation between prompt, status line, code output, headers, etc.). This was working correctly on the previous version (2.1.108/2.1.109) with no changes to terminal configuration.

Error Message

Error Messages/Logs

Root Cause

After auto-updating to v2.1.110, Claude Code renders all UI text in a single color (no color differentiation between prompt, status line, code output, headers, etc.). This was working correctly on the previous version (2.1.108/2.1.109) with no changes to terminal configuration.

Code Example

Actual behavior
All text renders in a single monotone color. The terminal profile's ANSI palette is ignored by Claude Code's main UI rendering (though the /theme preview diff does show colors correctly).
RAW_BUFFERClick to expand / collapse

Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

[BUG] v2.1.110 — All colors render as single monotone color in macOS Terminal.app regardless of /theme setting

Claude Code version: 2.1.110 OS: macOS (latest), Apple Terminal.app TERM: xterm-256color

Description

After auto-updating to v2.1.110, Claude Code renders all UI text in a single color (no color differentiation between prompt, status line, code output, headers, etc.). This was working correctly on the previous version (2.1.108/2.1.109) with no changes to terminal configuration.

Steps to reproduce

  1. Launch Apple Terminal.app with a properly configured profile (correct ANSI 16-color palette, non-green text/bold colors)
  2. Run claude (v2.1.110)
  3. Observe: all text renders in the same foreground color — no syntax highlighting, no colored UI elements

What I tried (none of these fix it)

  • /theme → Tried all 6 options including "Dark mode (ANSI colors only)" — no change
  • Verified $TERM = xterm-256color
  • Switched Terminal.app profile from Homebrew to a custom profile with correct ANSI palette and white/gray text colors
  • Confirmed ANSI Colors panel shows correct 16-color palette (not all green)
  • The /theme preview (code diff with red/green lines) renders colors correctly, but the main UI does not

Environment

  • macOS Terminal.app (not iTerm2)
  • TERM=xterm-256color
  • COLORTERM not set (default)
  • Profile: custom with standard ANSI color palette
  • Previously working on v2.1.108/2.1.109 with identical terminal configuration

Possibly related to #28192, but this is a regression in v2.1.110 — colors were working on v2.1.108/109 with the same terminal configuration.

What Should Happen?

Expected behavior Claude Code should render UI elements (prompt, status bar, code blocks, headers, diffs) with distinct colors as it did in v2.1.108 and earlier.

Error Messages/Logs

Actual behavior
All text renders in a single monotone color. The terminal profile's ANSI palette is ignored by Claude Code's main UI rendering (though the /theme preview diff does show colors correctly).

Steps to Reproduce

Steps to reproduce

Launch Apple Terminal.app with a properly configured profile (correct ANSI 16-color palette, non-green text/bold colors) Run claude (v2.1.110) Observe: all text renders in the same foreground color — no syntax highlighting, no colored UI elements

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

Claude Code version: 2.1.110

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

OS: macOS (latest), Apple Terminal.app TERM: xterm-256color

extent analysis

TL;DR

The issue can be resolved by investigating and potentially adjusting the color rendering logic in Claude Code version 2.1.110 to correctly interpret the ANSI 16-color palette in macOS Terminal.app.

Guidance

  • Verify that the xterm-256color TERM setting is correctly supported and utilized by Claude Code 2.1.110, as the issue might stem from a change in how this setting is handled.
  • Check for any updates or patches related to color rendering in the Claude Code version 2.1.110, as this is identified as a regression from previous versions.
  • Test Claude Code with a different terminal emulator, such as iTerm2, to isolate if the issue is specific to Apple Terminal.app or a more general problem with color handling in version 2.1.110.
  • Review the code changes between versions 2.1.109 and 2.1.110 to identify any modifications that could affect color rendering, particularly in relation to the ANSI color palette and the xterm-256color TERM setting.

Example

No specific code example can be provided without access to the Claude Code source, but the fix likely involves adjusting how Claude Code interprets and applies ANSI colors based on the terminal settings.

Notes

The issue seems to be specific to the combination of Claude Code version 2.1.110 and Apple Terminal.app, with the xterm-256color TERM setting. The fact that the /theme preview renders colors correctly suggests that the issue might be isolated to the main UI rendering logic.

Recommendation

Apply a workaround by potentially downgrading to version 2.1.109 if possible, or wait for an update to version 2.1.110 that addresses this regression, as the issue is confirmed to be a regression from a previous working version.

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claude-code - 💡(How to fix) Fix [BUG] v2.1.110 — All colors render as single monotone color in macOS Terminal.app regardless of /theme setting [2 comments, 2 participants]