diff --git a/crates/agent/src/active_thread.rs b/crates/agent/src/active_thread.rs
index e888ea61e0..3b7e8b3ee4 100644
--- a/crates/agent/src/active_thread.rs
+++ b/crates/agent/src/active_thread.rs
@@ -3417,6 +3417,7 @@ impl Render for ActiveThread {
         v_flex()
             .size_full()
             .relative()
+            .bg(cx.theme().colors().panel_background)
             .on_mouse_move(cx.listener(|this, _, _, cx| {
                 this.show_scrollbar = true;
                 this.hide_scrollbar_later(cx);
diff --git a/crates/agent/src/agent_panel.rs b/crates/agent/src/agent_panel.rs
index 6d6e5c471b..4e3e0bae2b 100644
--- a/crates/agent/src/agent_panel.rs
+++ b/crates/agent/src/agent_panel.rs
@@ -2135,6 +2135,7 @@ impl AgentPanel {
 
         v_flex()
             .size_full()
+            .bg(cx.theme().colors().panel_background)
             .when(recent_history.is_empty(), |this| {
                 let configuration_error_ref = &configuration_error;
                 this.child(