diff --git a/Content.Client/Anomaly/Ui/AnomalyGeneratorWindow.xaml b/Content.Client/Anomaly/Ui/AnomalyGeneratorWindow.xaml
index 88df194ecb..269b44f62c 100644
--- a/Content.Client/Anomaly/Ui/AnomalyGeneratorWindow.xaml
+++ b/Content.Client/Anomaly/Ui/AnomalyGeneratorWindow.xaml
@@ -1,4 +1,4 @@
-<controls:FancyWindow xmlns="https://spacestation14.io"
+<controls:FancyWindow xmlns="https://spacestation14.io"
                 xmlns:controls="clr-namespace:Content.Client.UserInterface.Controls"
                 Title="{Loc 'anomaly-generator-ui-title'}"
 
@@ -32,7 +32,7 @@
             </BoxContainer>
             <!--Sprite View-->
             <PanelContainer Margin="12 0 0 0"
-                            StyleClasses="Inset"
+                            StyleClasses="BackgroundPanelDark"
                             VerticalAlignment="Center">
                 <SpriteView Name="EntityView"
                             SetSize="96 96"
diff --git a/Content.Client/Atmos/Monitor/UI/AirAlarmWindow.xaml b/Content.Client/Atmos/Monitor/UI/AirAlarmWindow.xaml
index f0dc29facf..dc547dda6b 100644
--- a/Content.Client/Atmos/Monitor/UI/AirAlarmWindow.xaml
+++ b/Content.Client/Atmos/Monitor/UI/AirAlarmWindow.xaml
@@ -7,7 +7,7 @@
         <!-- Status (pressure, temperature, alarm state, device total, address, etc) -->
         <BoxContainer Orientation="Horizontal" Margin="0 0 0 2">
             <!-- Left column (view of entity) -->
-            <PanelContainer Margin="2 0 6 0" StyleClasses="Inset" VerticalAlignment="Center" VerticalExpand="True">
+            <PanelContainer Margin="2 0 6 0" StyleClasses="BackgroundPanelDark" VerticalAlignment="Center" VerticalExpand="True">
                 <SpriteView Name="EntityView" OverrideDirection="South" Scale="2 2" SetSize="64 64"/>
             </PanelContainer>
             <!-- Center column (pressure, temperature, alarm state) -->
diff --git a/Content.Client/CloningConsole/UI/CloningConsoleWindow.xaml b/Content.Client/CloningConsole/UI/CloningConsoleWindow.xaml
index f08b94c7ac..f4447fce0b 100644
--- a/Content.Client/CloningConsole/UI/CloningConsoleWindow.xaml
+++ b/Content.Client/CloningConsole/UI/CloningConsoleWindow.xaml
@@ -8,7 +8,7 @@
                       VerticalExpand="True"
                       HorizontalExpand="True"
                       MinSize="100 150">
-            <PanelContainer VerticalExpand="True" StyleClasses="Inset">
+            <PanelContainer VerticalExpand="True" StyleClasses="BackgroundPanelDark">
                 <BoxContainer Name="GeneticScannerContents" Margin="5 5 5 5" Orientation="Vertical" VerticalExpand="True" HorizontalExpand="True">
                     <Label HorizontalAlignment="Center" Text="{Loc 'cloning-console-window-scanner-details-label'}" />
                     <BoxContainer Orientation="Horizontal" VerticalExpand="True" HorizontalExpand="True">
@@ -35,7 +35,7 @@
                 </BoxContainer>
             </PanelContainer>
             <Control MinSize="50 5" />
-            <PanelContainer VerticalExpand="True" StyleClasses="Inset">
+            <PanelContainer VerticalExpand="True" StyleClasses="BackgroundPanelDark">
                 <BoxContainer Name="CloningPodContents" Margin="5 5 5 5" Orientation="Vertical" VerticalExpand="True" HorizontalExpand="True">
                     <Label HorizontalAlignment="Center" Text="{Loc 'cloning-console-window-pod-details-label'}" />
                     <BoxContainer Orientation="Vertical" VerticalExpand="True" HorizontalExpand="True">
diff --git a/Content.Client/Power/APC/UI/ApcMenu.xaml b/Content.Client/Power/APC/UI/ApcMenu.xaml
index 682aea55d2..7dd38c76fc 100644
--- a/Content.Client/Power/APC/UI/ApcMenu.xaml
+++ b/Content.Client/Power/APC/UI/ApcMenu.xaml
@@ -1,4 +1,4 @@
-<controls:FancyWindow  xmlns="https://spacestation14.io"
+<controls:FancyWindow  xmlns="https://spacestation14.io"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:controls="clr-namespace:Content.Client.UserInterface.Controls"
     xmlns:style="clr-namespace:Content.Client.Stylesheets"
@@ -10,7 +10,7 @@
         <BoxContainer Margin="0 5 10 10" Orientation="Vertical">
             <BoxContainer Margin="0" Orientation="Horizontal">
                 <!-- Sprite View -->
-                <PanelContainer Margin="0" StyleClasses="Inset" VerticalAlignment="Center">
+                <PanelContainer Margin="0" StyleClasses="BackgroundPanelDark" VerticalAlignment="Center">
                     <SpriteView Name="EntityView" Scale="2 2" SetSize="64 64" OverrideDirection="South" />
                 </PanelContainer>
                 <!-- Data -->
diff --git a/Content.Client/Power/Battery/BatteryMenu.xaml b/Content.Client/Power/Battery/BatteryMenu.xaml
index 83483a517e..3602126cd4 100644
--- a/Content.Client/Power/Battery/BatteryMenu.xaml
+++ b/Content.Client/Power/Battery/BatteryMenu.xaml
@@ -1,4 +1,4 @@
-<controls:FancyWindow xmlns="https://spacestation14.io"
+<controls:FancyWindow xmlns="https://spacestation14.io"
                       xmlns:controls="clr-namespace:Content.Client.UserInterface.Controls"
                       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                       xmlns:gfx="clr-namespace:Robust.Client.Graphics;assembly=Robust.Client"
@@ -16,7 +16,7 @@
                                     Margin="2 16" />
 
                     <!-- Box with breaker, label, values -->
-                    <PanelContainer HorizontalExpand="True" StyleClasses="Inset">
+                    <PanelContainer HorizontalExpand="True" StyleClasses="BackgroundPanelDark">
                         <BoxContainer Orientation="Vertical">
                             <BoxContainer Orientation="Horizontal">
                                 <Label Text="{Loc 'battery-menu-in'}" HorizontalExpand="True" VerticalAlignment="Top"
@@ -46,7 +46,7 @@
                                     Margin="2 16" />
 
                     <!-- Box with breaker, label, values -->
-                    <PanelContainer HorizontalExpand="True" StyleClasses="Inset">
+                    <PanelContainer HorizontalExpand="True" StyleClasses="BackgroundPanelDark">
                         <BoxContainer Orientation="Vertical">
                             <BoxContainer Orientation="Horizontal">
                                 <Label Text="{Loc 'battery-menu-out'}" HorizontalExpand="True" VerticalAlignment="Top"
@@ -69,7 +69,7 @@
             <!-- Middle pane: charge/discharge -->
             <BoxContainer Name="ChargeDischarge" Orientation="Vertical" HorizontalExpand="True">
                 <!-- Charge -->
-                <PanelContainer VerticalExpand="True" StyleClasses="Inset" Margin="0 0 0 8">
+                <PanelContainer VerticalExpand="True" StyleClasses="BackgroundPanelDark" Margin="0 0 0 8">
                     <BoxContainer Orientation="Vertical">
                         <Label Text="{Loc 'battery-menu-charge-header'}" StyleClasses="LabelKeyText" />
                         <BoxContainer Orientation="Vertical" VerticalExpand="True" VerticalAlignment="Center">
@@ -86,7 +86,7 @@
                     </BoxContainer>
                 </PanelContainer>
                 <!-- Discharge -->
-                <PanelContainer VerticalExpand="True" StyleClasses="Inset">
+                <PanelContainer VerticalExpand="True" StyleClasses="BackgroundPanelDark">
                     <BoxContainer Orientation="Vertical">
                         <Label Text="{Loc 'battery-menu-discharge-header'}" StyleClasses="LabelKeyText" />
                         <BoxContainer Orientation="Vertical" VerticalExpand="True" VerticalAlignment="Center">
@@ -111,7 +111,7 @@
             </BoxContainer>
 
             <!-- Right pane: storage -->
-            <PanelContainer Name="Storage" StyleClasses="Inset" HorizontalExpand="True">
+            <PanelContainer Name="Storage" StyleClasses="BackgroundPanelDark" HorizontalExpand="True">
                 <BoxContainer Orientation="Vertical">
                     <Label Text="{Loc 'battery-menu-storage-header'}" StyleClasses="LabelKeyText" />
                     <GridContainer Columns="2">
diff --git a/Content.Client/Power/Generator/GeneratorWindow.xaml b/Content.Client/Power/Generator/GeneratorWindow.xaml
index 85127a9644..f59e07a131 100644
--- a/Content.Client/Power/Generator/GeneratorWindow.xaml
+++ b/Content.Client/Power/Generator/GeneratorWindow.xaml
@@ -1,4 +1,4 @@
-<controls:FancyWindow xmlns="https://spacestation14.io"
+<controls:FancyWindow xmlns="https://spacestation14.io"
                 xmlns:cc="clr-namespace:Content.Client.Administration.UI.CustomControls"
                 xmlns:controls="clr-namespace:Content.Client.UserInterface.Controls"
                 MinSize="450 250"
@@ -41,7 +41,7 @@
             <Label Margin="2 0 0 0" Name="CloggedLabel" FontColorOverride="Red" Text="{Loc 'portable-generator-ui-clogged'}" />
         </BoxContainer>
         <cc:VSeparator StyleClasses="LowDivider"/>
-        <PanelContainer Margin="12 0 0 0" StyleClasses="Inset" VerticalAlignment="Center">
+        <PanelContainer Margin="12 0 0 0" StyleClasses="BackgroundPanelDark" VerticalAlignment="Center">
             <SpriteView Name="EntityView" SetSize="64 64" Scale="2 2" OverrideDirection="South" Margin="15"/>
         </PanelContainer>
     </BoxContainer>
diff --git a/Content.Client/Power/PowerCharge/PowerChargeWindow.xaml b/Content.Client/Power/PowerCharge/PowerChargeWindow.xaml
index 632126ba07..4c17c0a5f5 100644
--- a/Content.Client/Power/PowerCharge/PowerChargeWindow.xaml
+++ b/Content.Client/Power/PowerCharge/PowerChargeWindow.xaml
@@ -1,4 +1,4 @@
-<controls:FancyWindow
+<controls:FancyWindow
     xmlns="https://spacestation14.io"
     xmlns:controls="clr-namespace:Content.Client.UserInterface.Controls"
     MinSize="320 180"
@@ -76,7 +76,7 @@
             </GridContainer>
         </BoxContainer>
         <PanelContainer
-            StyleClasses="Inset"
+            StyleClasses="BackgroundPanelDark"
             VerticalAlignment="Top">
 
             <SpriteView Name="EntityView"
diff --git a/Content.Client/Stylesheets/Sheetlets/PanelSheetlet.cs b/Content.Client/Stylesheets/Sheetlets/PanelSheetlet.cs
index 64ce2e5356..d4d2114054 100644
--- a/Content.Client/Stylesheets/Sheetlets/PanelSheetlet.cs
+++ b/Content.Client/Stylesheets/Sheetlets/PanelSheetlet.cs
@@ -45,6 +45,10 @@ public sealed class PanelSheetlet<T> : Sheetlet<T> where T : PalettedStylesheet,
                 .Prop(PanelContainer.StylePropertyPanel, StyleBoxHelpers.BaseStyleBox(sheet))
                 .Modulate(sheet.SecondaryPalette.Background),
             E()
+                .Class(StyleClass.BackgroundPanelDark)
+                .Prop(PanelContainer.StylePropertyPanel, StyleBoxHelpers.BaseStyleBox(sheet))
+                .Modulate(sheet.SecondaryPalette.BackgroundDark),
+             E()
                 .Class(StyleClass.BackgroundPanelOpenLeft)
                 .Prop(PanelContainer.StylePropertyPanel, StyleBoxHelpers.OpenLeftStyleBox(sheet))
                 .Modulate(sheet.SecondaryPalette.Background),
diff --git a/Content.Client/Stylesheets/StyleClass.cs b/Content.Client/Stylesheets/StyleClass.cs
index e5fde69584..e569824b76 100644
--- a/Content.Client/Stylesheets/StyleClass.cs
+++ b/Content.Client/Stylesheets/StyleClass.cs
@@ -45,6 +45,7 @@ public static class StyleClass
     public const string LabelMonospaceSubHeading = "ConsoleSubHeading";
 
     public const string BackgroundPanel = "BackgroundPanel"; // replaces `AngleRect`
+    public const string BackgroundPanelDark = "BackgroundPanelDark"; // replaces `Inset`
     public const string BackgroundPanelOpenLeft = "BackgroundPanelOpenLeft"; // replaces `BackgroundOpenLeft`
     public const string BackgroundPanelOpenRight = "BackgroundPanelOpenRight"; // replaces `BackgroundOpenRight`
 
diff --git a/Content.Client/Stylesheets/StyleNano.cs b/Content.Client/Stylesheets/StyleNano.cs
index 01b666a4b0..52c340dada 100644
--- a/Content.Client/Stylesheets/StyleNano.cs
+++ b/Content.Client/Stylesheets/StyleNano.cs
@@ -67,7 +67,6 @@ namespace Content.Client.Stylesheets
         public const string StyleClassChatChannelSelectorButton = "chatSelectorOptionButton";
         public const string StyleClassChatFilterOptionButton = "chatFilterOptionButton";
         public const string StyleClassStorageButton = "storageButton";
-        public const string StyleClassInset = "Inset";
 
         public const string StyleClassConsoleHeading = "ConsoleHeading";
         public const string StyleClassConsoleSubHeading = "ConsoleSubHeading";
@@ -531,13 +530,6 @@ namespace Content.Client.Stylesheets
 
             var boxFont13 = resCache.GetFont("/Fonts/Boxfont-round/Boxfont Round.ttf", 13);
 
-            var insetBack = new StyleBoxTexture
-            {
-                Texture = buttonTex,
-                Modulate = Color.FromHex("#202023"),
-            };
-            insetBack.SetPatchMargin(StyleBox.Margin.All, 10);
-
             // Default paper background:
             var paperBackground = new StyleBoxTexture
             {
@@ -1625,10 +1617,6 @@ namespace Content.Client.Stylesheets
                 // Silicon law edit ui
                 Element<Label>().Class(SiliconLawContainer.StyleClassSiliconLawPositionLabel)
                     .Prop(Label.StylePropertyFontColor, NanoGold),
-
-                Element<PanelContainer>()
-                    .Class(StyleClassInset)
-                    .Prop(PanelContainer.StylePropertyPanel, insetBack),
             }).ToList());
         }
     }