diff --git a/Marechai.App/Presentation/ViewModels/SettingsViewModel.cs b/Marechai.App/Presentation/ViewModels/SettingsViewModel.cs
index 2957c939..2e3af1bc 100644
--- a/Marechai.App/Presentation/ViewModels/SettingsViewModel.cs
+++ b/Marechai.App/Presentation/ViewModels/SettingsViewModel.cs
@@ -95,6 +95,11 @@ public partial class SettingsViewModel : ObservableObject
             {
                 ThemeName   = "MacOS9",
                 DisplayName = _localizer["MacOS9Theme"]
+            },
+            new()
+            {
+                ThemeName   = "DOS",
+                DisplayName = _localizer["DOSTheme"]
             }
         };
 
diff --git a/Marechai.App/Services/ColorThemeService.cs b/Marechai.App/Services/ColorThemeService.cs
index 53a6861c..4ea477d2 100644
--- a/Marechai.App/Services/ColorThemeService.cs
+++ b/Marechai.App/Services/ColorThemeService.cs
@@ -34,7 +34,8 @@ public class ColorThemeService : IColorThemeService
     {
         DEFAULT_THEME,
         "Windows311",
-        "MacOS9"
+        "MacOS9",
+        "DOS"
     };
 
     public void SetThemeService(IThemeService themeService)
@@ -91,6 +92,7 @@ public class ColorThemeService : IColorThemeService
                                {
                                    "Windows311" => "ms-appx:///Styles/Win311ColorPalette.xaml",
                                    "MacOS9"     => "ms-appx:///Styles/MacOS9ColorPalette.xaml",
+                                   "DOS"        => "ms-appx:///Styles/DOSColorPalette.xaml",
                                    _            => null
                                };
 
diff --git a/Marechai.App/Strings/en/Resources.resw b/Marechai.App/Strings/en/Resources.resw
index e9513754..1e1e99a3 100644
--- a/Marechai.App/Strings/en/Resources.resw
+++ b/Marechai.App/Strings/en/Resources.resw
@@ -203,6 +203,9 @@
   <data name="MacOS9Theme" xml:space="preserve">
     <value>Mac OS 9</value>
   </data>
+  <data name="DOSTheme" xml:space="preserve">
+    <value>DOS / Turbo Vision</value>
+  </data>
   <data name="SettingsPage_BrightnessThemeSelector.Header" xml:space="preserve">
     <value>Brightness</value>
   </data>
diff --git a/Marechai.App/Strings/es/Resources.resw b/Marechai.App/Strings/es/Resources.resw
index ba65d6e3..dae693d7 100644
--- a/Marechai.App/Strings/es/Resources.resw
+++ b/Marechai.App/Strings/es/Resources.resw
@@ -203,6 +203,9 @@
   <data name="MacOS9Theme" xml:space="preserve">
     <value>Mac OS 9</value>
   </data>
+  <data name="DOSTheme" xml:space="preserve">
+    <value>DOS / Turbo Vision</value>
+  </data>
   <data name="SettingsPage_BrightnessThemeSelector.Header" xml:space="preserve">
     <value>Brillo</value>
   </data>
diff --git a/Marechai.App/Strings/fr/Resources.resw b/Marechai.App/Strings/fr/Resources.resw
index 695f1f02..79384a9c 100644
--- a/Marechai.App/Strings/fr/Resources.resw
+++ b/Marechai.App/Strings/fr/Resources.resw
@@ -203,6 +203,9 @@
   <data name="MacOS9Theme" xml:space="preserve">
     <value>Mac OS 9</value>
   </data>
+  <data name="DOSTheme" xml:space="preserve">
+    <value>DOS / Turbo Vision</value>
+  </data>
   <data name="SettingsPage_BrightnessThemeSelector.Header" xml:space="preserve">
     <value>Luminosité</value>
   </data>
diff --git a/Marechai.App/Strings/pt-BR/Resources.resw b/Marechai.App/Strings/pt-BR/Resources.resw
index 7a1fbb92..7ec20f91 100644
--- a/Marechai.App/Strings/pt-BR/Resources.resw
+++ b/Marechai.App/Strings/pt-BR/Resources.resw
@@ -203,6 +203,9 @@
   <data name="MacOS9Theme" xml:space="preserve">
     <value>Mac OS 9</value>
   </data>
+  <data name="DOSTheme" xml:space="preserve">
+    <value>DOS / Turbo Vision</value>
+  </data>
   <data name="SettingsPage_BrightnessThemeSelector.Header" xml:space="preserve">
     <value>Brilho</value>
   </data>
diff --git a/Marechai.App/Styles/DOSColorPalette.xaml b/Marechai.App/Styles/DOSColorPalette.xaml
new file mode 100644
index 00000000..c9c9736e
--- /dev/null
+++ b/Marechai.App/Styles/DOSColorPalette.xaml
@@ -0,0 +1,213 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+
+    <!-- DOS / Turbo Vision Theme -->
+    <!-- Classic blue background with cyan highlights and monospaced font -->
+
+    <!-- System Accent - Cyan/Bright Green -->
+    <Color x:Key="SystemAccentColor">#00FFFF</Color> <Color x:Key="SystemAccentColorLight1">#55FFFF</Color>
+    <Color x:Key="SystemAccentColorLight2">#AAFFFF</Color> <Color x:Key="SystemAccentColorLight3">#CCFFFF</Color>
+    <Color x:Key="SystemAccentColorDark1">#00CCCC</Color> <Color x:Key="SystemAccentColorDark2">#009999</Color>
+    <Color x:Key="SystemAccentColorDark3">#006666</Color>
+
+    <!-- Font Family - Monospace -->
+    <FontFamily x:Key="ContentControlThemeFontFamily">Cascadia Mono, Consolas, Courier New, monospace</FontFamily>
+    <FontFamily x:Key="SymbolThemeFontFamily">Cascadia Mono, Consolas, Courier New, monospace</FontFamily>
+
+    <!-- ALL TEXT - Yellow/White on Blue -->
+    <SolidColorBrush x:Key="TextFillColorPrimaryBrush"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="TextFillColorSecondaryBrush"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="TextFillColorTertiaryBrush"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="TextFillColorDisabledBrush"
+                     Color="#808080" />
+    <SolidColorBrush x:Key="TextControlForeground"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="TextControlForegroundPointerOver"
+                     Color="#FFFFFF" />
+    <SolidColorBrush x:Key="TextControlForegroundFocused"
+                     Color="#FFFFFF" />
+    <SolidColorBrush x:Key="TextControlForegroundDisabled"
+                     Color="#808080" />
+    <SolidColorBrush x:Key="TextControlPlaceholderForeground"
+                     Color="#AAAAAA" />
+    <SolidColorBrush x:Key="TextControlPlaceholderForegroundPointerOver"
+                     Color="#CCCCCC" />
+    <SolidColorBrush x:Key="TextControlPlaceholderForegroundFocused"
+                     Color="#CCCCCC" />
+    <SolidColorBrush x:Key="TextControlHeaderForeground"
+                     Color="#00FFFF" />
+
+    <!-- Button Text -->
+    <SolidColorBrush x:Key="ButtonForeground"
+                     Color="#000000" />
+    <SolidColorBrush x:Key="ButtonForegroundPointerOver"
+                     Color="#000000" />
+    <SolidColorBrush x:Key="ButtonForegroundPressed"
+                     Color="#000000" />
+    <SolidColorBrush x:Key="ButtonForegroundDisabled"
+                     Color="#808080" />
+
+    <!-- ComboBox Text -->
+    <SolidColorBrush x:Key="ComboBoxForeground"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="ComboBoxForegroundPointerOver"
+                     Color="#FFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxForegroundPressed"
+                     Color="#FFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxForegroundFocused"
+                     Color="#FFFFFF" />
+    <SolidColorBrush x:Key="ComboBoxForegroundDisabled"
+                     Color="#808080" />
+
+    <!-- Navigation and List Text -->
+    <SolidColorBrush x:Key="NavigationViewItemForeground"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="NavigationViewItemForegroundPointerOver"
+                     Color="#FFFFFF" />
+    <SolidColorBrush x:Key="NavigationViewItemForegroundPressed"
+                     Color="#FFFFFF" />
+    <SolidColorBrush x:Key="ListViewItemForeground"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="ListViewItemForegroundPointerOver"
+                     Color="#FFFFFF" />
+    <SolidColorBrush x:Key="ListViewItemForegroundSelected"
+                     Color="#000000" />
+
+    <!-- System Control Foreground -->
+    <SolidColorBrush x:Key="SystemControlForegroundBaseHighBrush"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="SystemControlForegroundBaseMediumBrush"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="SystemControlForegroundBaseMediumHighBrush"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="SystemControlForegroundBaseMediumLowBrush"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="SystemControlForegroundBaseLowBrush"
+                     Color="#FFFF00" />
+
+    <!-- System Colors -->
+    <SolidColorBrush x:Key="SystemBaseMediumColor"
+                     Color="#00FFFF" />
+    <SolidColorBrush x:Key="SystemBaseHighColor"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="SystemBaseMediumHighColor"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="SystemBaseMediumLowColor"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="SystemBaseLowColor"
+                     Color="#FFFF00" />
+
+    <!-- Backgrounds - Classic DOS Blue -->
+    <SolidColorBrush x:Key="ApplicationPageBackgroundThemeBrush"
+                     Color="#0000AA" />
+    <SolidColorBrush x:Key="LayerFillColorDefaultBrush"
+                     Color="#0000AA" />
+    <SolidColorBrush x:Key="LayerFillColorAltBrush"
+                     Color="#000088" />
+    <SolidColorBrush x:Key="CardBackgroundFillColorDefaultBrush"
+                     Color="#0000AA" />
+    <SolidColorBrush x:Key="CardBackgroundFillColorSecondaryBrush"
+                     Color="#000088" />
+    <SolidColorBrush x:Key="SurfaceFillColorDefaultBrush"
+                     Color="#0000AA" />
+    <SolidColorBrush x:Key="ControlFillColorDefaultBrush"
+                     Color="#0000AA" />
+    <SolidColorBrush x:Key="ControlFillColorSecondaryBrush"
+                     Color="#000099" />
+    <SolidColorBrush x:Key="ControlFillColorTertiaryBrush"
+                     Color="#000088" />
+    <SolidColorBrush x:Key="ControlFillColorDisabledBrush"
+                     Color="#000077" />
+    <SolidColorBrush x:Key="SubtleFillColorTransparentBrush"
+                     Color="Transparent" />
+    <SolidColorBrush x:Key="SubtleFillColorSecondaryBrush"
+                     Color="#000088" />
+    <SolidColorBrush x:Key="SubtleFillColorTertiaryBrush"
+                     Color="#000077" />
+
+    <!-- Button Backgrounds - Gray like Turbo Vision -->
+    <SolidColorBrush x:Key="ButtonBackground"
+                     Color="#AAAAAA" />
+    <SolidColorBrush x:Key="ButtonBackgroundPointerOver"
+                     Color="#00FF00" />
+    <SolidColorBrush x:Key="ButtonBackgroundPressed"
+                     Color="#00FFFF" />
+    <SolidColorBrush x:Key="ButtonBackgroundDisabled"
+                     Color="#555555" />
+
+    <!-- TextBox Backgrounds - Cyan on Blue -->
+    <SolidColorBrush x:Key="TextControlBackground"
+                     Color="#0000AA" />
+    <SolidColorBrush x:Key="TextControlBackgroundPointerOver"
+                     Color="#0000CC" />
+    <SolidColorBrush x:Key="TextControlBackgroundFocused"
+                     Color="#0000CC" />
+    <SolidColorBrush x:Key="TextControlBackgroundDisabled"
+                     Color="#000077" />
+
+    <!-- ComboBox Backgrounds -->
+    <SolidColorBrush x:Key="ComboBoxBackground"
+                     Color="#0000AA" />
+    <SolidColorBrush x:Key="ComboBoxBackgroundPointerOver"
+                     Color="#0000CC" />
+    <SolidColorBrush x:Key="ComboBoxBackgroundPressed"
+                     Color="#0000CC" />
+    <SolidColorBrush x:Key="ComboBoxBackgroundFocused"
+                     Color="#0000CC" />
+    <SolidColorBrush x:Key="ComboBoxBackgroundDisabled"
+                     Color="#000077" />
+
+    <!-- Navigation Backgrounds - Darker Blue -->
+    <SolidColorBrush x:Key="NavigationViewDefaultPaneBackground"
+                     Color="#000088" />
+    <SolidColorBrush x:Key="NavigationViewTopPaneBackground"
+                     Color="#000088" />
+    <SolidColorBrush x:Key="NavigationViewExpandedPaneBackground"
+                     Color="#000088" />
+
+    <!-- List Backgrounds - Cyan selection -->
+    <SolidColorBrush x:Key="ListViewItemBackground"
+                     Color="#0000AA" />
+    <SolidColorBrush x:Key="ListViewItemBackgroundPointerOver"
+                     Color="#0000CC" />
+    <SolidColorBrush x:Key="ListViewItemBackgroundPressed"
+                     Color="#000088" />
+    <SolidColorBrush x:Key="ListViewItemBackgroundSelected"
+                     Color="#00FFFF" />
+    <SolidColorBrush x:Key="ListViewItemBackgroundSelectedPointerOver"
+                     Color="#00FFFF" />
+
+    <!-- Borders - Cyan -->
+    <SolidColorBrush x:Key="CardStrokeColorDefaultBrush"
+                     Color="#00FFFF" />
+    <SolidColorBrush x:Key="ControlStrokeColorDefaultBrush"
+                     Color="#00FFFF" />
+    <SolidColorBrush x:Key="ControlStrokeColorSecondaryBrush"
+                     Color="#00AAAA" />
+    <SolidColorBrush x:Key="DividerStrokeColorDefaultBrush"
+                     Color="#008888" />
+    <SolidColorBrush x:Key="TextControlBorderBrush"
+                     Color="#00FFFF" />
+    <SolidColorBrush x:Key="TextControlBorderBrushPointerOver"
+                     Color="#00FFFF" />
+    <SolidColorBrush x:Key="TextControlBorderBrushFocused"
+                     Color="#FFFF00" />
+    <SolidColorBrush x:Key="ComboBoxBorderBrush"
+                     Color="#00FFFF" />
+    <SolidColorBrush x:Key="ComboBoxBorderBrushPointerOver"
+                     Color="#00FFFF" />
+    <SolidColorBrush x:Key="ComboBoxBorderBrushPressed"
+                     Color="#FFFF00" />
+
+    <!-- Accent Colors -->
+    <SolidColorBrush x:Key="AccentFillColorDefaultBrush"
+                     Color="#00FFFF" />
+    <SolidColorBrush x:Key="AccentFillColorSecondaryBrush"
+                     Color="#00CCCC" />
+    <SolidColorBrush x:Key="AccentFillColorTertiaryBrush"
+                     Color="#009999" />
+
+</ResourceDictionary>
\ No newline at end of file