Desktop App (Mac): User messages displayed in dark blue on black – poor readability

Description

Since a recent update, user messages in the Claude Code Desktop App (Mac) are displayed in dark blue text on a black background. This makes the text extremely hard to read and violates basic readability/contrast guidelines.

Steps to reproduce

1. Open Claude Code Desktop App on macOS
2. Type any message
3. Observe user message text color (dark blue on dark/black background)

Expected behavior

User messages should have sufficient contrast against the background — either white/light text on dark background, or the previous color scheme.

Why this matters — Accessibility & Readability

Blue text on a black background is one of the worst contrast combinations:

• WCAG 2.2 requires a minimum contrast ratio of 4.5:1 for normal text (Level AA) and 7:1 for Level AAA (W3C WCAG 2.2 — Success Criterion 1.4.3)
• Pure blue (#0000FF) on black (#000000) has a contrast ratio of only ~2.4:1 — far below the minimum 4.5:1 requirement (WebAIM Contrast Checker)
• Blue light has inherently low luminance, making it especially hard to read against dark backgrounds (WebAIM: Contrast and Color Accessibility)
• People with moderately low vision, color blindness (affects ~8% of males), or age-related vision changes are disproportionately affected (MDN: Color Contrast Accessibility)

Environment

• App: Claude Code Desktop App (Mac)
• OS: macOS

Notes

• /color default does not fix the issue (that only affects the status line color)
• This appears to be a UI regression — previous versions had readable text colors