Plan mode text is nearly invisible on light terminal backgrounds

Description

When entering plan mode, the text content of the plan is rendered in a very light/pearly white color that is nearly invisible against light terminal backgrounds. The text can only be read by highlighting/selecting it.

Steps to Reproduce

1. Use Claude Code in a terminal with a light/white background
2. Enter plan mode (e.g., create a plan for a task)
3. The plan text appears as near-white on white — unreadable

Screenshot

The plan text is barely visible — appears as faint pearly marks on a white background. Only readable when text is highlighted/selected.

Expected Behavior

Plan mode text should be clearly readable on both light and dark terminal backgrounds.

Environment

• Claude Code CLI (latest)
• macOS (Darwin 24.4.0)
• iTerm2 with a light-background profile
• Started noticing: 2026-03-30

Workaround

Switching the terminal profile to a dark background makes the text readable.

Notes

This appears to be an ANSI color choice for plan mode content that assumes a dark terminal background. Regular (non-plan) output is fine on light backgrounds — only plan mode is affected.