diff --git a/Content.Client/Options/UI/Tabs/MiscTab.xaml b/Content.Client/Options/UI/Tabs/MiscTab.xaml
index 2ee59910f7..5564d7b226 100644
--- a/Content.Client/Options/UI/Tabs/MiscTab.xaml
+++ b/Content.Client/Options/UI/Tabs/MiscTab.xaml
@@ -25,6 +25,14 @@
                 <CheckBox Name="ReducedMotionCheckBox" Text="{Loc 'ui-options-reduced-motion'}" />
                 <CheckBox Name="EnableColorNameCheckBox" Text="{Loc 'ui-options-enable-color-name'}" />
                 <CheckBox Name="ColorblindFriendlyCheckBox" Text="{Loc 'ui-options-colorblind-friendly'}" />
+                <BoxContainer Orientation="Horizontal">
+                    <Label Text="{Loc 'ui-options-chat-window-opacity'}" Margin="8 0" />
+                    <Slider Name="ChatWindowOpacitySlider"
+                            MinValue="0"
+                            MaxValue="1"
+                            MinWidth="200" />
+                    <Label Name="ChatWindowOpacityLabel" Margin="8 0" />
+                </BoxContainer>
                 <BoxContainer Orientation="Horizontal">
                     <Label Text="{Loc 'ui-options-screen-shake-intensity'}" Margin="8 0" />
                     <Slider Name="ScreenShakeIntensitySlider"
@@ -65,6 +73,3 @@
         </controls:StripeBack>
     </BoxContainer>
 </tabs:MiscTab>
-
-
-
diff --git a/Content.Client/Options/UI/Tabs/MiscTab.xaml.cs b/Content.Client/Options/UI/Tabs/MiscTab.xaml.cs
index 3b9c41efdf..476e7289ea 100644
--- a/Content.Client/Options/UI/Tabs/MiscTab.xaml.cs
+++ b/Content.Client/Options/UI/Tabs/MiscTab.xaml.cs
@@ -66,6 +66,7 @@ namespace Content.Client.Options.UI.Tabs
             EnableColorNameCheckBox.OnToggled += OnCheckBoxToggled;
             ColorblindFriendlyCheckBox.OnToggled += OnCheckBoxToggled;
             ReducedMotionCheckBox.OnToggled += OnCheckBoxToggled;
+            ChatWindowOpacitySlider.OnValueChanged += OnChatWindowOpacitySliderChanged;
             ScreenShakeIntensitySlider.OnValueChanged += OnScreenShakeIntensitySliderChanged;
             // ToggleWalk.OnToggled += OnCheckBoxToggled;
             StaticStorageUI.OnToggled += OnCheckBoxToggled;
@@ -81,6 +82,7 @@ namespace Content.Client.Options.UI.Tabs
             EnableColorNameCheckBox.Pressed = _cfg.GetCVar(CCVars.ChatEnableColorName);
             ColorblindFriendlyCheckBox.Pressed = _cfg.GetCVar(CCVars.AccessibilityColorblindFriendly);
             ReducedMotionCheckBox.Pressed = _cfg.GetCVar(CCVars.ReducedMotion);
+            ChatWindowOpacitySlider.Value = _cfg.GetCVar(CCVars.ChatWindowOpacity);
             ScreenShakeIntensitySlider.Value = _cfg.GetCVar(CCVars.ScreenShakeIntensity) * 100f;
             // ToggleWalk.Pressed = _cfg.GetCVar(CCVars.ToggleWalk);
             StaticStorageUI.Pressed = _cfg.GetCVar(CCVars.StaticStorageUI);
@@ -101,6 +103,13 @@ namespace Content.Client.Options.UI.Tabs
             UpdateApplyButton();
         }
 
+        private void OnChatWindowOpacitySliderChanged(Range range)
+        {
+            ChatWindowOpacityLabel.Text = Loc.GetString("ui-options-chat-window-opacity-percent",
+                ("opacity", range.Value));
+            UpdateApplyButton();
+        }
+
         private void OnScreenShakeIntensitySliderChanged(Range obj)
         {
             ScreenShakeIntensityLabel.Text = Loc.GetString("ui-options-screen-shake-percent", ("intensity", ScreenShakeIntensitySlider.Value / 100f));
@@ -127,6 +136,7 @@ namespace Content.Client.Options.UI.Tabs
             _cfg.SetCVar(CCVars.ChatEnableColorName, EnableColorNameCheckBox.Pressed);
             _cfg.SetCVar(CCVars.AccessibilityColorblindFriendly, ColorblindFriendlyCheckBox.Pressed);
             _cfg.SetCVar(CCVars.ReducedMotion, ReducedMotionCheckBox.Pressed);
+            _cfg.SetCVar(CCVars.ChatWindowOpacity, ChatWindowOpacitySlider.Value);
             _cfg.SetCVar(CCVars.ScreenShakeIntensity, ScreenShakeIntensitySlider.Value / 100f);
             // _cfg.SetCVar(CCVars.ToggleWalk, ToggleWalk.Pressed);
             _cfg.SetCVar(CCVars.StaticStorageUI, StaticStorageUI.Pressed);
@@ -154,6 +164,7 @@ namespace Content.Client.Options.UI.Tabs
             var isEnableColorNameSame = EnableColorNameCheckBox.Pressed == _cfg.GetCVar(CCVars.ChatEnableColorName);
             var isColorblindFriendly = ColorblindFriendlyCheckBox.Pressed == _cfg.GetCVar(CCVars.AccessibilityColorblindFriendly);
             var isReducedMotionSame = ReducedMotionCheckBox.Pressed == _cfg.GetCVar(CCVars.ReducedMotion);
+            var isChatWindowOpacitySame = Math.Abs(ChatWindowOpacitySlider.Value - _cfg.GetCVar(CCVars.ChatWindowOpacity)) < 0.01f;
             var isScreenShakeIntensitySame = Math.Abs(ScreenShakeIntensitySlider.Value / 100f - _cfg.GetCVar(CCVars.ScreenShakeIntensity)) < 0.01f;
             // var isToggleWalkSame = ToggleWalk.Pressed == _cfg.GetCVar(CCVars.ToggleWalk);
             var isStaticStorageUISame = StaticStorageUI.Pressed == _cfg.GetCVar(CCVars.StaticStorageUI);
@@ -170,6 +181,7 @@ namespace Content.Client.Options.UI.Tabs
                                    isEnableColorNameSame &&
                                    isColorblindFriendly &&
                                    isReducedMotionSame &&
+                                   isChatWindowOpacitySame &&
                                    isScreenShakeIntensitySame &&
                                    // isToggleWalkSame &&
                                    isStaticStorageUISame;
diff --git a/Content.Client/Stylesheets/StyleNano.cs b/Content.Client/Stylesheets/StyleNano.cs
index 2c7a1873a3..a589abb83a 100644
--- a/Content.Client/Stylesheets/StyleNano.cs
+++ b/Content.Client/Stylesheets/StyleNano.cs
@@ -45,6 +45,7 @@ namespace Content.Client.Stylesheets
         public const string StyleClassBorderedWindowPanel = "BorderedWindowPanel";
         public const string StyleClassInventorySlotBackground = "InventorySlotBackground";
         public const string StyleClassHandSlotHighlight = "HandSlotHighlight";
+        public const string StyleClassChatPanel = "ChatPanel";
         public const string StyleClassChatSubPanel = "ChatSubPanel";
         public const string StyleClassTransparentBorderedWindowPanel = "TransparentBorderedWindowPanel";
         public const string StyleClassHotbarPanel = "HotbarPanel";
@@ -144,6 +145,8 @@ namespace Content.Client.Stylesheets
         public const string StyleClassButtonColorRed = "ButtonColorRed";
         public const string StyleClassButtonColorGreen = "ButtonColorGreen";
 
+        public static readonly Color ChatBackgroundColor = Color.FromHex("#25252ADD");
+
         public override Stylesheet Stylesheet { get; }
 
         public StyleNano(IResourceCache resCache) : base(resCache)
@@ -346,12 +349,16 @@ namespace Content.Client.Stylesheets
             lineEdit.SetPatchMargin(StyleBox.Margin.All, 3);
             lineEdit.SetContentMarginOverride(StyleBox.Margin.Horizontal, 5);
 
-            var chatSubBGTex = resCache.GetTexture("/Textures/Interface/Nano/chat_sub_background.png");
-            var chatSubBG = new StyleBoxTexture
+            var chatBg = new StyleBoxFlat
             {
-                Texture = chatSubBGTex,
+                BackgroundColor = ChatBackgroundColor
             };
-            chatSubBG.SetPatchMargin(StyleBox.Margin.All, 2);
+
+            var chatSubBg = new StyleBoxFlat
+            {
+                BackgroundColor = ChatBackgroundColor,
+            };
+            chatSubBg.SetContentMarginOverride(StyleBox.Margin.All, 2);
 
             var actionSearchBoxTex = resCache.GetTexture("/Textures/Interface/Nano/black_panel_dark_thin_border.png");
             var actionSearchBox = new StyleBoxTexture
@@ -850,6 +857,13 @@ namespace Content.Client.Stylesheets
                 Element<TextEdit>().Pseudo(TextEdit.StylePseudoClassPlaceholder)
                     .Prop("font-color", Color.Gray),
 
+                // chat subpanels (chat lineedit backing, popup backings)
+                new StyleRule(new SelectorElement(typeof(PanelContainer), new[] {StyleClassChatPanel}, null, null),
+                    new[]
+                    {
+                        new StyleProperty(PanelContainer.StylePropertyPanel, chatBg),
+                    }),
+
                 // Chat lineedit - we don't actually draw a stylebox around the lineedit itself, we put it around the
                 // input + other buttons, so we must clear the default stylebox
                 new StyleRule(new SelectorElement(typeof(LineEdit), new[] {StyleClassChatLineEdit}, null, null),
@@ -858,13 +872,6 @@ namespace Content.Client.Stylesheets
                         new StyleProperty(LineEdit.StylePropertyStyleBox, new StyleBoxEmpty()),
                     }),
 
-                // chat subpanels (chat lineedit backing, popup backings)
-                new StyleRule(new SelectorElement(typeof(PanelContainer), new[] {StyleClassChatSubPanel}, null, null),
-                    new[]
-                    {
-                        new StyleProperty(PanelContainer.StylePropertyPanel, chatSubBG),
-                    }),
-
                 // Action searchbox lineedit
                 new StyleRule(new SelectorElement(typeof(LineEdit), new[] {StyleClassActionSearchBox}, null, null),
                     new[]
diff --git a/Content.Client/UserInterface/Systems/Chat/ChatUIController.cs b/Content.Client/UserInterface/Systems/Chat/ChatUIController.cs
index ac0ea5335e..907268295c 100644
--- a/Content.Client/UserInterface/Systems/Chat/ChatUIController.cs
+++ b/Content.Client/UserInterface/Systems/Chat/ChatUIController.cs
@@ -9,6 +9,7 @@ using Content.Client.Chat.UI;
 using Content.Client.Examine;
 using Content.Client.Gameplay;
 using Content.Client.Ghost;
+using Content.Client.Stylesheets;
 using Content.Client.UserInterface.Screens;
 using Content.Client.UserInterface.Systems.Chat.Widgets;
 using Content.Client.UserInterface.Systems.Gameplay;
@@ -54,7 +55,6 @@ public sealed class ChatUIController : UIController
     [Dependency] private readonly IStateManager _state = default!;
     [Dependency] private readonly IGameTiming _timing = default!;
     [Dependency] private readonly IReplayRecordingManager _replayRecording = default!;
-    [Dependency] private readonly IConfigurationManager _cfg = default!;
 
     [UISystemDependency] private readonly ExamineSystem? _examine = default;
     [UISystemDependency] private readonly GhostSystem? _ghost = default;
@@ -179,8 +179,8 @@ public sealed class ChatUIController : UIController
         _net.RegisterNetMessage<MsgChatMessage>(OnChatMessage);
         _net.RegisterNetMessage<MsgDeleteChatMessagesBy>(OnDeleteChatMessagesBy);
         SubscribeNetworkEvent<DamageForceSayEvent>(OnDamageForceSay);
-        _cfg.OnValueChanged(CCVars.ChatEnableColorName, (value) => { _chatNameColorsEnabled = value; });
-        _chatNameColorsEnabled = _cfg.GetCVar(CCVars.ChatEnableColorName);
+        _config.OnValueChanged(CCVars.ChatEnableColorName, (value) => { _chatNameColorsEnabled = value; });
+        _chatNameColorsEnabled = _config.GetCVar(CCVars.ChatEnableColorName);
 
         _speechBubbleRoot = new LayoutContainer();
 
@@ -232,6 +232,9 @@ public sealed class ChatUIController : UIController
         {
             _chatNameColors[i] = nameColors[i].ToHex();
         }
+
+        _config.OnValueChanged(CCVars.ChatWindowOpacity, OnChatWindowOpacityChanged);
+
     }
 
     public void OnScreenLoad()
@@ -240,6 +243,8 @@ public sealed class ChatUIController : UIController
 
         var viewportContainer = UIManager.ActiveScreen!.FindControl<LayoutContainer>("ViewportContainer");
         SetSpeechBubbleRoot(viewportContainer);
+
+        SetChatWindowOpacity(_config.GetCVar(CCVars.ChatWindowOpacity));
     }
 
     public void OnScreenUnload()
@@ -247,6 +252,34 @@ public sealed class ChatUIController : UIController
         SetMainChat(false);
     }
 
+    private void OnChatWindowOpacityChanged(float opacity)
+    {
+        SetChatWindowOpacity(opacity);
+    }
+
+    private void SetChatWindowOpacity(float opacity)
+    {
+        var chatBox = UIManager.ActiveScreen?.GetWidget<ChatBox>() ?? UIManager.ActiveScreen?.GetWidget<ResizableChatBox>();
+
+        var panel = chatBox?.ChatWindowPanel;
+        if (panel is null)
+            return;
+
+        Color color;
+        if (panel.PanelOverride is StyleBoxFlat styleBoxFlat)
+            color = styleBoxFlat.BackgroundColor;
+        else if (panel.TryGetStyleProperty<StyleBox>(PanelContainer.StylePropertyPanel, out var style)
+                 && style is StyleBoxFlat propStyleBoxFlat)
+            color = propStyleBoxFlat.BackgroundColor;
+        else
+            color = StyleNano.ChatBackgroundColor;
+
+        panel.PanelOverride = new StyleBoxFlat
+        {
+            BackgroundColor = color.WithAlpha(opacity)
+        };
+    }
+
     public void SetMainChat(bool setting)
     {
         if (UIManager.ActiveScreen == null)
@@ -770,7 +803,7 @@ public sealed class ChatUIController : UIController
         ProcessChatMessage(msg);
 
         if ((msg.Channel & ChatChannel.AdminRelated) == 0 ||
-            _cfg.GetCVar(CCVars.ReplayRecordAdminChat))
+            _config.GetCVar(CCVars.ReplayRecordAdminChat))
         {
             _replayRecording.RecordClientMessage(msg);
         }
@@ -830,7 +863,7 @@ public sealed class ChatUIController : UIController
                 break;
 
             case ChatChannel.LOOC:
-                if (_cfg.GetCVar(CCVars.LoocAboveHeadShow))
+                if (_config.GetCVar(CCVars.LoocAboveHeadShow))
                     AddSpeechBubble(msg, SpeechBubble.SpeechType.Looc);
                 break;
         }
diff --git a/Content.Client/UserInterface/Systems/Chat/Controls/ChatInputBox.cs b/Content.Client/UserInterface/Systems/Chat/Controls/ChatInputBox.xaml.cs
similarity index 95%
rename from Content.Client/UserInterface/Systems/Chat/Controls/ChatInputBox.cs
rename to Content.Client/UserInterface/Systems/Chat/Controls/ChatInputBox.xaml.cs
index 843fd46c1a..0326664bd6 100644
--- a/Content.Client/UserInterface/Systems/Chat/Controls/ChatInputBox.cs
+++ b/Content.Client/UserInterface/Systems/Chat/Controls/ChatInputBox.xaml.cs
@@ -1,4 +1,5 @@
-using Content.Shared.Chat;
+using Content.Client.Stylesheets;
+using Content.Shared.Chat;
 using Content.Shared.Input;
 using Robust.Client.UserInterface.Controls;
 
@@ -44,6 +45,7 @@ public class ChatInputBox : PanelContainer
             StyleClasses = {"chatFilterOptionButton"}
         };
         Container.AddChild(FilterButton);
+        AddStyleClass(StyleNano.StyleClassChatSubPanel);
         ChannelSelector.OnChannelSelect += UpdateActiveChannel;
     }
 
diff --git a/Content.Client/UserInterface/Systems/Chat/Widgets/ChatBox.xaml b/Content.Client/UserInterface/Systems/Chat/Widgets/ChatBox.xaml
index 090041fa93..36cdce8598 100644
--- a/Content.Client/UserInterface/Systems/Chat/Widgets/ChatBox.xaml
+++ b/Content.Client/UserInterface/Systems/Chat/Widgets/ChatBox.xaml
@@ -7,11 +7,8 @@
     HorizontalExpand="True"
     VerticalExpand="True"
     MinSize="465 225">
-    <PanelContainer HorizontalExpand="True" VerticalExpand="True">
-        <PanelContainer.PanelOverride>
-            <graphics:StyleBoxFlat BackgroundColor="#25252ADD" />
-        </PanelContainer.PanelOverride>
-
+    <PanelContainer Name="ChatWindowPanel" Access="Public" HorizontalExpand="True" VerticalExpand="True"
+                    StyleClasses="StyleNano.StyleClassChatPanel">
         <BoxContainer Orientation="Vertical" SeparationOverride="4" HorizontalExpand="True" VerticalExpand="True">
             <OutputPanel Name="Contents" HorizontalExpand="True" VerticalExpand="True" Margin="8 8 8 4" />
             <controls:ChatInputBox HorizontalExpand="True" Name="ChatInput" Access="Public" Margin="2"/>
diff --git a/Content.Shared/CCVar/CCVars.cs b/Content.Shared/CCVar/CCVars.cs
index 51f782991e..82d1fdd14a 100644
--- a/Content.Shared/CCVar/CCVars.cs
+++ b/Content.Shared/CCVar/CCVars.cs
@@ -1580,6 +1580,13 @@ namespace Content.Shared.CCVar
         * Accessibility
         */
 
+        /// <summary>
+        /// Chat window opacity slider, controlling the alpha of the chat window background.
+        /// Goes from to 0 (completely transparent) to 1 (completely opaque)
+        /// </summary>
+        public static readonly CVarDef<float> ChatWindowOpacity =
+            CVarDef.Create("accessibility.chat_window_transparency", 0.85f, CVar.CLIENTONLY | CVar.ARCHIVE);
+
         /// <summary>
         /// Toggle for visual effects that may potentially cause motion sickness.
         /// Where reasonable, effects affected by this CVar should use an alternate effect.
diff --git a/Resources/Locale/en-US/escape-menu/ui/options-menu.ftl b/Resources/Locale/en-US/escape-menu/ui/options-menu.ftl
index ff56d54274..67d09c9012 100644
--- a/Resources/Locale/en-US/escape-menu/ui/options-menu.ftl
+++ b/Resources/Locale/en-US/escape-menu/ui/options-menu.ftl
@@ -48,6 +48,8 @@ ui-options-fancy-name-background = Add background to speech bubble names
 ui-options-enable-color-name = Add colors to character names
 ui-options-colorblind-friendly = Colorblind friendly mode
 ui-options-reduced-motion = Reduce motion of visual effects
+ui-options-chat-window-opacity = Chat window opacity
+ui-options-chat-window-opacity-percent = { TOSTRING($opacity, "P0") }
 ui-options-screen-shake-intensity = Screen shake intensity
 ui-options-screen-shake-percent = { TOSTRING($intensity, "P0") }
 ui-options-vsync = VSync