From 5fac7b25665fea8dc27bfb5edf9d2f7911549c7a Mon Sep 17 00:00:00 2001
From: Jeremy Rose <172423086+nornagon-openai@users.noreply.github.com>
Date: Thu, 21 Aug 2025 11:44:18 -0700
Subject: [PATCH] tweak thresholds for shimmer on non-true-color terminals
 (#2533)

https://github.com/user-attachments/assets/dc7bf820-eeec-4b78-aba9-231e1337921c
---
 codex-rs/tui/src/shimmer.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/codex-rs/tui/src/shimmer.rs b/codex-rs/tui/src/shimmer.rs
index 24373cee..b5752fc3 100644
--- a/codex-rs/tui/src/shimmer.rs
+++ b/codex-rs/tui/src/shimmer.rs
@@ -63,9 +63,11 @@ pub(crate) fn shimmer_spans(text: &str) -> Vec<Span<'static>> {
 }
 
 fn color_for_level(level: u8) -> Style {
-    if level < 144 {
+    // Tune thresholds so the edges of the shimmer band appear dim
+    // in fallback mode (no true color support).
+    if level < 160 {
         Style::default().add_modifier(Modifier::DIM)
-    } else if level < 208 {
+    } else if level < 224 {
         Style::default()
     } else {
         Style::default().add_modifier(Modifier::BOLD)