Update color and naming for consistency (#10367)

The `ClearColor` PR was merged before I was quite finished. This fixes a
few errors, and addresses Cart's feedback about the pixel perfect
example by updating the sprite colors to match the existing bevy bird
branding colors.


![image](https://github.com/bevyengine/bevy/assets/2632925/33722c45-ed66-4d3a-af11-f4197611a13c)

examples/2d/bloom_2d.rs

@@ -37,7 +37,7 @@ fn setup(
 
     // Sprite
     commands.spawn(SpriteBundle {
-        texture: asset_server.load("branding/bevy_bird_light.png"),
+        texture: asset_server.load("branding/bevy_bird_dark.png"),
         sprite: Sprite {
             color: Color::rgb(5.0, 5.0, 5.0), // 4. Put something bright in a dark environment to see the effect
             custom_size: Some(Vec2::splat(160.0)),

examples/2d/pixel_perfect.rs

@@ -25,7 +25,7 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
     commands.spawn(Camera2dBundle::default());
     commands.spawn((
         SpriteBundle {
-            texture: asset_server.load("pixel/bevy_pixel_light.png"),
+            texture: asset_server.load("pixel/bevy_pixel_dark.png"),
             transform: Transform::from_xyz(100., 0., 0.),
             ..default()
         },

examples/2d/sprite.rs

@@ -12,7 +12,7 @@ fn main() {
 fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
     commands.spawn(Camera2dBundle::default());
     commands.spawn(SpriteBundle {
-        texture: asset_server.load("branding/bevy_bird_light.png"),
+        texture: asset_server.load("branding/bevy_bird_dark.png"),
         ..default()
     });
 }

examples/2d/sprite_flipping.rs

@@ -12,7 +12,7 @@ fn main() {
 fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
     commands.spawn(Camera2dBundle::default());
     commands.spawn(SpriteBundle {
-        texture: asset_server.load("branding/bevy_bird_light.png"),
+        texture: asset_server.load("branding/bevy_bird_dark.png"),
         sprite: Sprite {
             // Flip the logo to the left
             flip_x: true,

examples/3d/anti_aliasing.rs

@@ -264,7 +264,7 @@ fn setup(
     // Plane
     commands.spawn(PbrBundle {
         mesh: meshes.add(shape::Plane::from_size(50.0).into()),
-        material: materials.add(Color::GRAY.into()),
+        material: materials.add(Color::rgb(0.1, 0.2, 0.1).into()),
         ..default()
     });
 

examples/3d/deferred_rendering.rs

@@ -97,7 +97,7 @@ fn setup(
         ..default()
     });
 
-    let mut forward_mat: StandardMaterial = Color::GRAY.into();
+    let mut forward_mat: StandardMaterial = Color::rgb(0.1, 0.2, 0.1).into();
     forward_mat.opaque_render_method = OpaqueRendererMethod::Forward;
     let forward_mat_h = materials.add(forward_mat);
 

examples/3d/tonemapping.rs

@@ -107,7 +107,7 @@ fn setup_basic_scene(
     commands.spawn((
         PbrBundle {
             mesh: meshes.add(shape::Plane::from_size(50.0).into()),
-            material: materials.add(Color::GRAY.into()),
+            material: materials.add(Color::rgb(0.1, 0.2, 0.1).into()),
             ..default()
         },
         SceneNumber(1),