fix: stop using ANSI blue (#2421)

- One less color.
- Replaced with cyan which looks better next to other cyan components.

codex-rs/tui/src/bottom_pane/selection_popup_common.rs

@@ -101,7 +101,7 @@ pub(crate) fn render_rows(
             if Some(i) == state.selected_idx {
                 cell = cell.style(
                     Style::default()
-                        .fg(Color::Blue)
+                        .fg(Color::Cyan)
                         .add_modifier(Modifier::BOLD),
                 );
             } else if *is_current {

codex-rs/tui/src/history_cell.rs

@@ -711,7 +711,7 @@ pub(crate) fn new_plan_update(update: UpdatePlanArgs) -> PlainHistoryCell {
                     Span::styled(
                         step,
                         Style::default()
-                            .fg(Color::Blue)
+                            .fg(Color::Cyan)
                             .add_modifier(Modifier::BOLD),
                     ),
                 ),
@@ -913,9 +913,9 @@ fn format_mcp_invocation<'a>(invocation: McpInvocation) -> Line<'a> {
         .unwrap_or_default();
 
     let invocation_spans = vec![
-        Span::styled(invocation.server.clone(), Style::default().fg(Color::Blue)),
+        Span::styled(invocation.server.clone(), Style::default().fg(Color::Cyan)),
         Span::raw("."),
-        Span::styled(invocation.tool.clone(), Style::default().fg(Color::Blue)),
+        Span::styled(invocation.tool.clone(), Style::default().fg(Color::Cyan)),
         Span::raw("("),
         Span::styled(args_str, Style::default().add_modifier(Modifier::DIM)),
         Span::raw(")"),

codex-rs/tui/src/onboarding/auth.rs

@@ -130,8 +130,8 @@ impl AuthModeWidget {
 
             let line1 = if is_selected {
                 Line::from(vec![
-                    format!("{} {}. ", caret, idx + 1).blue().dim(),
+                    format!("{} {}. ", caret, idx + 1).cyan().dim(),
-                    text.to_string().blue(),
+                    text.to_string().cyan(),
                 ])
             } else {
                 Line::from(format!("  {}. {text}", idx + 1))
@@ -139,7 +139,7 @@ impl AuthModeWidget {
 
             let line2 = if is_selected {
                 Line::from(format!("     {description}"))
-                    .fg(Color::Blue)
+                    .fg(Color::Cyan)
                     .add_modifier(Modifier::DIM)
             } else {
                 Line::from(format!("     {description}"))
@@ -163,6 +163,8 @@ impl AuthModeWidget {
         ));
         lines.push(Line::from(""));
         lines.push(
+            // AE: Following styles.md, this should probably be Cyan because it's a user input tip.
+            //     But leaving this for a future cleanup.
             Line::from("  Press Enter to continue")
                 .style(Style::default().add_modifier(Modifier::DIM)),
         );
@@ -194,7 +196,7 @@ impl AuthModeWidget {
                 lines.push(Line::from("  If the link doesn't open automatically, open the following link to authenticate:"));
                 lines.push(Line::from(vec![
                     Span::raw("  "),
-                    state.auth_url.as_str().blue().underlined(),
+                    state.auth_url.as_str().cyan().underlined(),
                 ]));
                 lines.push(Line::from(""));
             }
@@ -238,7 +240,7 @@ impl AuthModeWidget {
             ])
             .style(Style::default().add_modifier(Modifier::DIM)),
             Line::from(""),
-            Line::from("  Press Enter to continue").fg(Color::Blue),
+            Line::from("  Press Enter to continue").fg(Color::Cyan),
         ];
 
         Paragraph::new(lines)
@@ -267,7 +269,7 @@ impl AuthModeWidget {
             Line::from(
                 "  To use Codex with the OpenAI API, set OPENAI_API_KEY in your environment",
             )
-            .style(Style::default().fg(Color::Blue)),
+            .style(Style::default().fg(Color::Cyan)),
             Line::from(""),
             Line::from("  Press Enter to return")
                 .style(Style::default().add_modifier(Modifier::DIM)),

codex-rs/tui/src/onboarding/trust_directory.rs

@@ -75,7 +75,7 @@ impl WidgetRef for &TrustDirectoryWidget {
             |idx: usize, option: TrustDirectorySelection, text: &str| -> Line<'static> {
                 let is_selected = self.highlighted == option;
                 if is_selected {
-                    Line::from(format!("> {}. {text}", idx + 1)).blue()
+                    Line::from(format!("> {}. {text}", idx + 1)).cyan()
                 } else {
                     Line::from(format!("  {}. {}", idx + 1, text))
                 }
@@ -109,6 +109,8 @@ impl WidgetRef for &TrustDirectoryWidget {
             lines.push(Line::from(format!("  {error}")).fg(Color::Red));
             lines.push(Line::from(""));
         }
+        // AE: Following styles.md, this should probably be Cyan because it's a user input tip.
+        //     But leaving this for a future cleanup.
         lines.push(Line::from("  Press Enter to continue").add_modifier(Modifier::DIM));
 
         Paragraph::new(lines)

codex-rs/tui/src/user_approval_widget.rs

@@ -145,7 +145,7 @@ impl UserApprovalWidget<'_> {
             } => {
                 let cmd = strip_bash_lc_and_escape(command);
                 let mut contents: Vec<Line> = to_command_display(
-                    vec!["? ".fg(Color::Blue), "Codex wants to run ".bold()],
+                    vec!["? ".fg(Color::Cyan), "Codex wants to run ".bold()],
                     cmd,
                     vec![],
                 );

codex-rs/tui/styles.md

@@ -7,16 +7,15 @@
 # Foreground colors
 
 - **Default:** Most of the time, just use the default foreground color. `reset` can help get it back.
-- **Selection:** Use ANSI `blue`. (Ed & AE want to make this cyan too, but we'll do that in a followup since it's riskier in different themes.)
+- **User input tips, selection, and status indicators:** Use ANSI `cyan`.
-- **User input tips and status indicators:** Use ANSI `cyan`.
 - **Success and additions:** Use ANSI `green`.
 - **Errors, failures and deletions:** Use ANSI `red`.
 - **Codex:** Use ANSI `magenta`.
 
 # Avoid
 
-- Avoid custom colors because there's no guarantee that they'll contrast well or look good in various terminal color themes.
+- Avoid custom colors because there's no guarantee that they'll contrast well or look good in various terminal color themes. (`shimmer.rs` is an exception that works well because we take the default colors and just adjust their levels.)
 - Avoid ANSI `black` & `white` as foreground colors because the default terminal theme color will do a better job. (Use `reset` if you need to in order to get those.) The exception is if you need contrast rendering over a manually colored background.
-- Avoid ANSI `yellow` because for now the style guide doesn't use it. Prefer a foreground color mentioned above.
+- Avoid ANSI `blue` and `yellow` because for now the style guide doesn't use them. Prefer a foreground color mentioned above.
 
 (There are some rules to try to catch this in `clippy.toml`.)