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fix(tui) fix user message light mode background (#9407)

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## Summary
Fixes the user message styles for light mode.

## Testing
Attaching 2 screenshots from ghostty, but I also tried various styles in
Terminal.app and iTerm2.
**Before**
<img width="888" height="560" alt="Screenshot 2026-01-16 at 5 22 36 PM"
src="https://github.com/user-attachments/assets/73d9decb-a01a-4ece-b88e-ea49a33cc0c6"
/>

**After**
<img width="890" height="281" alt="Screenshot 2026-01-16 at 5 22 59 PM"
src="https://github.com/user-attachments/assets/6689e286-d699-4ceb-b0cb-579a31b047bf"
/>
This commit is contained in:
Dylan Hurd 2026-01-19 23:58:44 -08:00 • committed by GitHub
parent eb90e20c0b
commit 3078eedb24
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GPG key ID: B5690EEEBB952194
1 changed files with 4 additions and 4 deletions
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8
codex-rs/tui/src/style.rs
View file

@ -19,10 +19,10 @@ pub fn user_message_style_for(terminal_bg: Option<(u8, u8, u8)>) -> Style {
#[allow(clippy::disallowed_methods)]
pub fn user_message_bg(terminal_bg: (u8, u8, u8)) -> Color {
let top = if is_light(terminal_bg) {
(0, 0, 0)
let (top, alpha) = if is_light(terminal_bg) {
((0, 0, 0), 0.04)
} else {
(255, 255, 255)
((255, 255, 255), 0.12)
};
best_color(blend(top, terminal_bg, 0.1))
best_color(blend(top, terminal_bg, alpha))
}