diff --git a/config/src/terminal.rs b/config/src/terminal.rs
index 8ab92d0ef01..02da49176b2 100644
--- a/config/src/terminal.rs
+++ b/config/src/terminal.rs
@@ -17,6 +17,12 @@ impl TermConfig {
         }
     }
 
+    pub fn with_config(config: ConfigHandle) -> Self {
+        Self {
+            config: Mutex::new(Some(config)),
+        }
+    }
+
     pub fn set_config(&self, config: ConfigHandle) {
         self.config.lock().unwrap().replace(config);
     }
diff --git a/mux/src/localpane.rs b/mux/src/localpane.rs
index 922905e583c..3021011c8f7 100644
--- a/mux/src/localpane.rs
+++ b/mux/src/localpane.rs
@@ -6,7 +6,7 @@ use crate::{Domain, Mux, MuxNotification};
 use anyhow::Error;
 use async_trait::async_trait;
 use config::keyassignment::ScrollbackEraseMode;
-use config::{configuration, ExitBehavior, TermConfig};
+use config::{configuration, ExitBehavior};
 #[cfg(windows)]
 use filedescriptor::OwnedHandle;
 use portable_pty::{Child, ExitStatus, MasterPty, PtySize};
@@ -25,7 +25,7 @@ use url::Url;
 use wezterm_term::color::ColorPalette;
 use wezterm_term::{
     Alert, AlertHandler, CellAttributes, Clipboard, KeyCode, KeyModifiers, MouseEvent,
-    SemanticZone, StableRowIndex, Terminal,
+    SemanticZone, StableRowIndex, Terminal, TerminalConfiguration,
 };
 
 #[derive(Debug)]
@@ -202,10 +202,14 @@ impl Pane for LocalPane {
         self.terminal.borrow_mut().set_clipboard(clipboard);
     }
 
-    fn set_config(&self, config: Arc<TermConfig>) {
+    fn set_config(&self, config: Arc<dyn TerminalConfiguration>) {
         self.terminal.borrow_mut().set_config(config);
     }
 
+    fn get_config(&self) -> Option<Arc<dyn TerminalConfiguration>> {
+        Some(self.terminal.borrow().get_config())
+    }
+
     fn perform_actions(&self, actions: Vec<termwiz::escape::Action>) {
         self.terminal.borrow_mut().perform_actions(actions)
     }
diff --git a/mux/src/pane.rs b/mux/src/pane.rs
index e1d741f089f..17364fbadaa 100644
--- a/mux/src/pane.rs
+++ b/mux/src/pane.rs
@@ -3,7 +3,6 @@ use crate::renderable::*;
 use crate::Mux;
 use async_trait::async_trait;
 use config::keyassignment::ScrollbackEraseMode;
-use config::TermConfig;
 use downcast_rs::{impl_downcast, Downcast};
 use portable_pty::PtySize;
 use rangeset::RangeSet;
@@ -16,7 +15,10 @@ use termwiz::hyperlink::Rule;
 use termwiz::surface::Line;
 use url::Url;
 use wezterm_term::color::ColorPalette;
-use wezterm_term::{Clipboard, KeyCode, KeyModifiers, MouseEvent, SemanticZone, StableRowIndex};
+use wezterm_term::{
+    Clipboard, KeyCode, KeyModifiers, MouseEvent, SemanticZone, StableRowIndex,
+    TerminalConfiguration,
+};
 
 static PANE_ID: ::std::sync::atomic::AtomicUsize = ::std::sync::atomic::AtomicUsize::new(0);
 pub type PaneId = usize;
@@ -341,7 +343,10 @@ pub trait Pane: Downcast {
     fn is_alt_screen_active(&self) -> bool;
 
     fn set_clipboard(&self, _clipboard: &Arc<dyn Clipboard>) {}
-    fn set_config(&self, _config: Arc<TermConfig>) {}
+    fn set_config(&self, _config: Arc<dyn TerminalConfiguration>) {}
+    fn get_config(&self) -> Option<Arc<dyn TerminalConfiguration>> {
+        None
+    }
 
     fn get_current_working_dir(&self) -> Option<Url>;
 
diff --git a/term/src/terminalstate.rs b/term/src/terminalstate.rs
index 19eee93adf6..7616cdd1ac4 100644
--- a/term/src/terminalstate.rs
+++ b/term/src/terminalstate.rs
@@ -518,6 +518,10 @@ impl TerminalState {
         self.config = config;
     }
 
+    pub fn get_config(&self) -> Arc<dyn TerminalConfiguration> {
+        Arc::clone(&self.config)
+    }
+
     pub fn set_clipboard(&mut self, clipboard: &Arc<dyn Clipboard>) {
         self.clipboard.replace(Arc::clone(clipboard));
     }
diff --git a/wezterm-gui/src/overlay/launcher.rs b/wezterm-gui/src/overlay/launcher.rs
index f7a52c9cfb5..7ab1cf04cfd 100644
--- a/wezterm-gui/src/overlay/launcher.rs
+++ b/wezterm-gui/src/overlay/launcher.rs
@@ -9,14 +9,15 @@ use crate::termwindow::clipboard::ClipboardHelper;
 use crate::termwindow::spawn::SpawnWhere;
 use crate::termwindow::TermWindow;
 use anyhow::anyhow;
-use config::configuration;
 use config::keyassignment::{SpawnCommand, SpawnTabDomain};
+use config::{configuration, TermConfig};
 use mux::domain::{DomainId, DomainState};
 use mux::tab::TabId;
 use mux::termwiztermtab::TermWizTerminal;
 use mux::window::WindowId;
 use mux::Mux;
 use portable_pty::PtySize;
+use std::sync::Arc;
 use termwiz::cell::{AttributeChange, CellAttributes};
 use termwiz::color::ColorAttribute;
 use termwiz::input::{InputEvent, KeyCode, KeyEvent, MouseButtons, MouseEvent};
@@ -106,6 +107,7 @@ pub fn launcher(
     domains: Vec<(DomainId, String, DomainState, String)>,
     clipboard: ClipboardHelper,
     size: PtySize,
+    term_config: Arc<TermConfig>,
 ) -> anyhow::Result<()> {
     let mut active_idx = 0;
     let mut entries = vec![];
@@ -205,6 +207,7 @@ pub fn launcher(
         size: PtySize,
         mux_window_id: WindowId,
         clipboard: ClipboardHelper,
+        term_config: Arc<TermConfig>,
     ) {
         match entries[active_idx].clone() {
             Entry::Spawn {
@@ -219,6 +222,7 @@ pub fn launcher(
                         size,
                         mux_window_id,
                         clipboard,
+                        term_config,
                     );
                 })
                 .detach();
@@ -270,7 +274,14 @@ pub fn launcher(
                     active_idx = y as usize - 1;
 
                     if mouse_buttons == MouseButtons::LEFT {
-                        launch(active_idx, &entries, size, mux_window_id, clipboard);
+                        launch(
+                            active_idx,
+                            &entries,
+                            size,
+                            mux_window_id,
+                            clipboard,
+                            term_config,
+                        );
                         break;
                     }
                 }
@@ -283,7 +294,14 @@ pub fn launcher(
                 key: KeyCode::Enter,
                 ..
             }) => {
-                launch(active_idx, &entries, size, mux_window_id, clipboard);
+                launch(
+                    active_idx,
+                    &entries,
+                    size,
+                    mux_window_id,
+                    clipboard,
+                    term_config,
+                );
                 break;
             }
             _ => {}
diff --git a/wezterm-gui/src/scripting/guiwin.rs b/wezterm-gui/src/scripting/guiwin.rs
index de31b3df4f6..e365825a756 100644
--- a/wezterm-gui/src/scripting/guiwin.rs
+++ b/wezterm-gui/src/scripting/guiwin.rs
@@ -9,7 +9,7 @@ use mlua::{UserData, UserDataMethods};
 use mux::window::WindowId as MuxWindowId;
 use serde::*;
 use wezterm_toast_notification::ToastNotification;
-use window::WindowOps;
+use window::{Connection, ConnectionOps, WindowOps};
 
 #[derive(Clone)]
 pub struct GuiWin {
@@ -43,6 +43,9 @@ impl UserData for GuiWin {
                 Ok(())
             },
         );
+        methods.add_method("get_appearance", |_, _, _: ()| {
+            Ok(Connection::get().unwrap().get_appearance().to_string())
+        });
         methods.add_method("set_right_status", |_, this, status: String| {
             this.window.notify(TermWindowNotif::SetRightStatus(status));
             Ok(())
diff --git a/wezterm-gui/src/termwindow/mod.rs b/wezterm-gui/src/termwindow/mod.rs
index 6e4c567766b..bfcf081bc1c 100644
--- a/wezterm-gui/src/termwindow/mod.rs
+++ b/wezterm-gui/src/termwindow/mod.rs
@@ -527,6 +527,7 @@ impl TermWindow {
             myself.gl.replace(Rc::clone(&gl));
             myself.created(&window, Rc::clone(&gl))?;
             myself.subscribe_to_pane_updates();
+            myself.emit_window_event("window-config-reloaded");
             myself.emit_status_event();
         }
 
@@ -545,6 +546,10 @@ impl TermWindow {
                 self.close_requested(window);
                 Ok(true)
             }
+            WindowEvent::AppearanceChanged(_appearance) => {
+                self.config_was_reloaded();
+                Ok(true)
+            }
             WindowEvent::FocusChanged(focused) => {
                 self.focus_changed(focused, window);
                 Ok(true)
@@ -1012,9 +1017,8 @@ impl TermWindow {
         }
 
         if let Some(window) = mux.get_window(self.mux_window_id) {
-            let term_config = TermConfig::new();
-            term_config.set_config(config.clone());
-            let term_config = Arc::new(term_config);
+            let term_config: Arc<dyn TerminalConfiguration> =
+                Arc::new(TermConfig::with_config(config.clone()));
             for tab in window.iter() {
                 for pane in tab.iter_panes() {
                     pane.pane.set_config(Arc::clone(&term_config));
@@ -1413,6 +1417,7 @@ impl TermWindow {
             .expect("tab has no panes!")
             .domain_id();
         let size = self.terminal_size;
+        let term_config = Arc::new(TermConfig::with_config(self.config.clone()));
 
         let (overlay, future) = start_overlay(self, &tab, move |tab_id, term| {
             launcher(
@@ -1423,6 +1428,7 @@ impl TermWindow {
                 domains,
                 clipboard,
                 size,
+                term_config,
             )
         });
         self.assign_overlay(tab.tab_id(), overlay);
diff --git a/wezterm-gui/src/termwindow/spawn.rs b/wezterm-gui/src/termwindow/spawn.rs
index 5caf3066c44..ea06097c4c4 100644
--- a/wezterm-gui/src/termwindow/spawn.rs
+++ b/wezterm-gui/src/termwindow/spawn.rs
@@ -1,6 +1,7 @@
 use crate::termwindow::{ClipboardHelper, MuxWindowId};
 use anyhow::{anyhow, bail};
 use config::keyassignment::{SpawnCommand, SpawnTabDomain};
+use config::TermConfig;
 use mux::activity::Activity;
 use mux::domain::DomainState;
 use mux::tab::SplitDirection;
@@ -23,6 +24,8 @@ impl super::TermWindow {
         } else {
             self.terminal_size
         };
+        let term_config = Arc::new(TermConfig::with_config(self.config.clone()));
+
         Self::spawn_command_impl(
             spawn,
             spawn_where,
@@ -31,6 +34,7 @@ impl super::TermWindow {
             ClipboardHelper {
                 window: self.window.as_ref().unwrap().clone(),
             },
+            term_config,
         )
     }
 
@@ -40,13 +44,20 @@ impl super::TermWindow {
         size: PtySize,
         src_window_id: MuxWindowId,
         clipboard: ClipboardHelper,
+        term_config: Arc<TermConfig>,
     ) {
         let spawn = spawn.clone();
 
         promise::spawn::spawn(async move {
-            if let Err(err) =
-                Self::spawn_command_internal(spawn, spawn_where, size, src_window_id, clipboard)
-                    .await
+            if let Err(err) = Self::spawn_command_internal(
+                spawn,
+                spawn_where,
+                size,
+                src_window_id,
+                clipboard,
+                term_config,
+            )
+            .await
             {
                 log::error!("Failed to spawn: {:#}", err);
             }
@@ -60,6 +71,7 @@ impl super::TermWindow {
         size: PtySize,
         src_window_id: MuxWindowId,
         clipboard: ClipboardHelper,
+        term_config: Arc<TermConfig>,
     ) -> anyhow::Result<()> {
         let mux = Mux::get().unwrap();
         let activity = Activity::new();
@@ -173,9 +185,10 @@ impl super::TermWindow {
                     let pane = domain
                         .split_pane(cmd_builder, cwd, tab.tab_id(), pane.pane_id(), direction)
                         .await?;
+                    pane.set_config(term_config);
                     pane.set_clipboard(&clipboard);
                 } else {
-                    log::error!("there is no active tab while splitting pane!?");
+                    bail!("there is no active tab while splitting pane!?");
                 }
             }
             _ => {
@@ -186,6 +199,7 @@ impl super::TermWindow {
                 let pane = tab
                     .get_active_pane()
                     .ok_or_else(|| anyhow!("newly spawned tab to have a pane"))?;
+                pane.set_config(term_config);
 
                 if spawn_where != SpawnWhere::NewWindow {
                     pane.set_clipboard(&clipboard);
diff --git a/wezterm-mux-server-impl/src/sessionhandler.rs b/wezterm-mux-server-impl/src/sessionhandler.rs
index 01d128b6798..2d2920ed88d 100644
--- a/wezterm-mux-server-impl/src/sessionhandler.rs
+++ b/wezterm-mux-server-impl/src/sessionhandler.rs
@@ -648,6 +648,11 @@ async fn split_pane(split: SplitPane, sender: PduSender) -> anyhow::Result<Pdu>
     };
 
     let pane_id = split.pane_id;
+    let current_pane = mux
+        .get_pane(pane_id)
+        .ok_or_else(|| anyhow!("pane_id {} is invalid", pane_id))?;
+    let term_config = current_pane.get_config();
+
     let cwd = split.command_dir.or_else(|| {
         mux.get_pane(pane_id)
             .and_then(|pane| pane.get_current_working_dir())
@@ -686,6 +691,9 @@ async fn split_pane(split: SplitPane, sender: PduSender) -> anyhow::Result<Pdu>
         sender,
     });
     pane.set_clipboard(&clip);
+    if let Some(config) = term_config {
+        pane.set_config(config);
+    }
 
     Ok::<Pdu, anyhow::Error>(Pdu::SpawnResponse(SpawnResponse {
         pane_id: pane.pane_id(),
@@ -745,12 +753,23 @@ async fn domain_spawn_v2(spawn: SpawnV2, sender: PduSender) -> anyhow::Result<Pd
     };
 
     let window_builder;
+    let term_config;
 
     let window_id = if let Some(window_id) = spawn.window_id {
-        mux.get_window_mut(window_id)
+        let window = mux
+            .get_window_mut(window_id)
             .ok_or_else(|| anyhow!("window_id {} not found on this server", window_id))?;
+        let tab = window
+            .get_active()
+            .ok_or_else(|| anyhow!("window {} has no tabs", window_id))?;
+        let pane = tab
+            .get_active_pane()
+            .ok_or_else(|| anyhow!("active tab in window {} has no panes", window_id))?;
+        term_config = pane.get_config();
+
         window_id
     } else {
+        term_config = None;
         window_builder = mux.new_empty_window();
         *window_builder
     };
@@ -763,6 +782,10 @@ async fn domain_spawn_v2(spawn: SpawnV2, sender: PduSender) -> anyhow::Result<Pd
         .get_active_pane()
         .ok_or_else(|| anyhow!("missing active pane on tab!?"))?;
 
+    if let Some(config) = term_config {
+        pane.set_config(config);
+    }
+
     let clip: Arc<dyn Clipboard> = Arc::new(RemoteClipboard {
         pane_id: pane.pane_id(),
         sender,
diff --git a/window/examples/async.rs b/window/examples/async.rs
index 56699a13774..1f78935fc71 100644
--- a/window/examples/async.rs
+++ b/window/examples/async.rs
@@ -70,7 +70,9 @@ impl MyWindow {
                     win.finish_frame(frame).unwrap();
                 }
             }
-            WindowEvent::Notification(_) | WindowEvent::FocusChanged(_) => {}
+            WindowEvent::AppearanceChanged(_)
+            | WindowEvent::Notification(_)
+            | WindowEvent::FocusChanged(_) => {}
         }
     }
 }
diff --git a/window/examples/wgpu.rs b/window/examples/wgpu.rs
index f152507f8f2..d90d11b35bf 100644
--- a/window/examples/wgpu.rs
+++ b/window/examples/wgpu.rs
@@ -245,7 +245,9 @@ impl MyWindow {
             WindowEvent::NeedRepaint => {
                 self.paint(win).unwrap();
             }
-            WindowEvent::Notification(_) | WindowEvent::FocusChanged(_) => {}
+            WindowEvent::AppearanceChanged(_)
+            | WindowEvent::Notification(_)
+            | WindowEvent::FocusChanged(_) => {}
         }
     }
 }
diff --git a/window/src/lib.rs b/window/src/lib.rs
index 2a5632712dc..1937a0f67f2 100644
--- a/window/src/lib.rs
+++ b/window/src/lib.rs
@@ -123,6 +123,8 @@ pub enum WindowEvent {
 
     MouseEvent(MouseEvent),
 
+    AppearanceChanged(Appearance),
+
     Notification(Box<dyn Any + Send + Sync>),
 }
 
@@ -144,8 +146,10 @@ impl WindowEventSender {
     }
 
     pub fn dispatch(&mut self, event: WindowEvent) {
-        log::trace!("{:?}", event);
-        (self.handler)(event, self.window.as_ref().unwrap());
+        if let Some(window) = self.window.as_ref() {
+            log::trace!("{:?}", event);
+            (self.handler)(event, window);
+        }
     }
 }
 
diff --git a/window/src/os/macos/window.rs b/window/src/os/macos/window.rs
index 90c4531f6e1..35fba6b6800 100644
--- a/window/src/os/macos/window.rs
+++ b/window/src/os/macos/window.rs
@@ -1476,6 +1476,16 @@ impl WindowView {
         YES
     }
 
+    extern "C" fn view_did_change_effective_appearance(this: &mut Object, _sel: Sel) {
+        if let Some(this) = Self::get_this(this) {
+            let appearance = Connection::get().unwrap().get_appearance();
+            this.inner
+                .borrow_mut()
+                .events
+                .dispatch(WindowEvent::AppearanceChanged(appearance));
+        }
+    }
+
     extern "C" fn window_should_close(this: &mut Object, _sel: Sel, _id: id) -> BOOL {
         unsafe {
             let () = msg_send![this, setNeedsDisplay: YES];
@@ -2100,6 +2110,11 @@ impl WindowView {
                 Self::accepts_first_mouse as extern "C" fn(&mut Object, Sel, id) -> BOOL,
             );
 
+            cls.add_method(
+                sel!(viewDidChangeEffectiveAppearance),
+                Self::view_did_change_effective_appearance as extern "C" fn(&mut Object, Sel),
+            );
+
             // NSTextInputClient
 
             cls.add_method(