2 files changed, 7 insertions, 22 deletions
diff --git a/winit/src/application.rs b/winit/src/application.rs
index abe6b8a9..55fd9e73 100644
--- a/winit/src/application.rs
+++ b/winit/src/application.rs
@@ -6,9 +6,10 @@ pub use state::State;
 use crate::clipboard::{self, Clipboard};
 use crate::conversion;
 use crate::mouse;
+use crate::theme::{self, Definition as _};
 use crate::{
-    Color, Command, Debug, Error, Executor, Mode, Proxy, Runtime, Settings,
-    Size, Subscription,
+    Command, Debug, Error, Executor, Mode, Proxy, Runtime, Settings, Size,
+    Subscription,
 };
 
 use iced_futures::futures;
@@ -77,13 +78,6 @@ pub trait Application: Program {
         Mode::Windowed
     }
 
-    /// Returns the background [`Color`] of the [`Application`].
-    ///
-    /// By default, it returns [`Color::WHITE`].
-    fn background_color(&self) -> Color {
-        Color::WHITE
-    }
-
     /// Returns the scale factor of the [`Application`].
     ///
     /// It can be used to dynamically control the size of the UI at runtime
@@ -115,6 +109,7 @@ where
     A: Application + 'static,
     E: Executor + 'static,
     C: window::Compositor<Renderer = A::Renderer> + 'static,
+    <A::Renderer as iced_native::Renderer>::Theme: theme::Definition,
 {
     use futures::task;
     use futures::Future;
@@ -250,6 +245,7 @@ async fn run_instance<A, E, C>(
     A: Application + 'static,
     E: Executor + 'static,
     C: window::Compositor<Renderer = A::Renderer> + 'static,
+    <A::Renderer as iced_native::Renderer>::Theme: theme::Definition,
 {
     use iced_futures::futures::stream::StreamExt;
     use winit::event;
@@ -425,7 +421,7 @@ async fn run_instance<A, E, C>(
                     &mut renderer,
                     &mut surface,
                     state.viewport(),
-                    state.background_color(),
+                    theme.background_color(),
                     &debug.overlay(),
                 ) {
                     Ok(()) => {
diff --git a/winit/src/application/state.rs b/winit/src/application/state.rs
index b54d3aed..34a9b10e 100644
--- a/winit/src/application/state.rs
+++ b/winit/src/application/state.rs
@@ -1,5 +1,5 @@
 use crate::conversion;
-use crate::{Application, Color, Debug, Mode, Point, Size, Viewport};
+use crate::{Application, Debug, Mode, Point, Size, Viewport};
 
 use std::marker::PhantomData;
 use winit::event::{Touch, WindowEvent};
@@ -10,7 +10,6 @@ use winit::window::Window;
 pub struct State<A: Application> {
     title: String,
     mode: Mode,
-    background_color: Color,
     scale_factor: f64,
     viewport: Viewport,
     viewport_version: usize,
@@ -24,7 +23,6 @@ impl<A: Application> State<A> {
     pub fn new(application: &A, window: &Window) -> Self {
         let title = application.title();
         let mode = application.mode();
-        let background_color = application.background_color();
         let scale_factor = application.scale_factor();
 
         let viewport = {
@@ -39,7 +37,6 @@ impl<A: Application> State<A> {
         Self {
             title,
             mode,
-            background_color,
             scale_factor,
             viewport,
             viewport_version: 0,
@@ -50,11 +47,6 @@ impl<A: Application> State<A> {
         }
     }
 
-    /// Returns the current background [`Color`] of the [`State`].
-    pub fn background_color(&self) -> Color {
-        self.background_color
-    }
-
     /// Returns the current [`Viewport`] of the [`State`].
     pub fn viewport(&self) -> &Viewport {
         &self.viewport
@@ -187,9 +179,6 @@ impl<A: Application> State<A> {
             self.mode = new_mode;
         }
 
-        // Update background color
-        self.background_color = application.background_color();
-
         // Update scale factor
         let new_scale_factor = application.scale_factor();