diff --git a/src/theme.rs b/src/theme.rs
new file mode 100644
index 0000000..552713a
--- /dev/null
+++ b/src/theme.rs
@@ -0,0 +1,191 @@
+use eframe::egui;
+
+/// Modern dark purple color palette
+pub struct ColorPalette {
+    // Background colors
+    pub bg_primary: egui::Color32,     // Main background
+    pub bg_secondary: egui::Color32,   // Secondary panels
+    pub bg_tertiary: egui::Color32,    // Elevated elements
+    pub bg_hover: egui::Color32,       // Hover states
+
+    // Accent colors
+    pub accent_primary: egui::Color32,   // Primary purple accent
+    pub accent_secondary: egui::Color32, // Secondary accent
+    pub accent_bright: egui::Color32,    // Bright highlights
+
+    // Text colors
+    pub text_primary: egui::Color32,
+    pub text_secondary: egui::Color32,
+    pub text_muted: egui::Color32,
+
+    // UI element colors
+    pub selection: egui::Color32,
+    pub highlight: egui::Color32,
+    pub line_number: egui::Color32,
+    pub border: egui::Color32,
+
+    // Status colors
+    pub success: egui::Color32,
+    pub warning: egui::Color32,
+    pub error: egui::Color32,
+}
+
+impl ColorPalette {
+    pub fn dark_purple() -> Self {
+        Self {
+            // Deep purple-gray backgrounds
+            bg_primary: egui::Color32::from_rgb(24, 20, 32),      // #18141F
+            bg_secondary: egui::Color32::from_rgb(32, 26, 42),    // #201A2A
+            bg_tertiary: egui::Color32::from_rgb(42, 35, 54),     // #2A2336
+            bg_hover: egui::Color32::from_rgba_premultiplied(90, 75, 115, 40),
+
+            // Purple accents - modern and vibrant
+            accent_primary: egui::Color32::from_rgb(138, 98, 208),   // #8A62D0
+            accent_secondary: egui::Color32::from_rgb(108, 68, 178), // #6C44B2
+            accent_bright: egui::Color32::from_rgb(168, 128, 238),   // #A880EE
+
+            // Text colors with good contrast
+            text_primary: egui::Color32::from_rgb(230, 230, 240),   // #E6E6F0
+            text_secondary: egui::Color32::from_rgb(190, 190, 210), // #BEBED2
+            text_muted: egui::Color32::from_rgb(140, 140, 165),     // #8C8CA5
+
+            // UI elements
+            selection: egui::Color32::from_rgb(108, 68, 178),       // #6C44B2
+            highlight: egui::Color32::from_rgba_premultiplied(138, 98, 208, 60),
+            line_number: egui::Color32::from_rgb(110, 100, 130),    // #6E6482
+            border: egui::Color32::from_rgb(60, 50, 75),            // #3C324B
+
+            // Status colors
+            success: egui::Color32::from_rgb(100, 200, 130),        // #64C882
+            warning: egui::Color32::from_rgb(255, 180, 80),         // #FFB450
+            error: egui::Color32::from_rgb(240, 100, 120),          // #F06478
+        }
+    }
+}
+
+/// Apply the dark purple theme to the egui context
+pub fn apply_theme(ctx: &egui::Context) {
+    let palette = ColorPalette::dark_purple();
+
+    let mut style = (*ctx.style()).clone();
+
+    // === Spacing and sizing for better UX ===
+    style.spacing.item_spacing = egui::vec2(8.0, 6.0);
+    style.spacing.button_padding = egui::vec2(12.0, 6.0);
+    style.spacing.menu_margin = egui::Margin::same(8.0);
+    style.spacing.indent = 20.0;
+    style.spacing.scroll = egui::style::ScrollStyle {
+        bar_width: 10.0,
+        handle_min_length: 20.0,
+        bar_inner_margin: 2.0,
+        bar_outer_margin: 0.0,
+        ..Default::default()
+    };
+
+    // === Color scheme ===
+    let visuals = &mut style.visuals;
+
+    // Dark mode
+    visuals.dark_mode = true;
+
+    // Window and panel backgrounds
+    visuals.window_fill = palette.bg_primary;
+    visuals.panel_fill = palette.bg_primary;
+    visuals.faint_bg_color = palette.bg_secondary;
+    visuals.extreme_bg_color = palette.bg_tertiary;
+
+    // Text colors (using override_text_color to set custom text color)
+    visuals.override_text_color = Some(palette.text_primary);
+
+    // Widget colors
+    visuals.widgets.noninteractive.bg_fill = palette.bg_secondary;
+    visuals.widgets.noninteractive.weak_bg_fill = palette.bg_secondary;
+    visuals.widgets.noninteractive.bg_stroke = egui::Stroke::new(1.0, palette.border);
+    visuals.widgets.noninteractive.fg_stroke = egui::Stroke::new(1.0, palette.text_secondary);
+
+    // Inactive/hovered widgets
+    visuals.widgets.inactive.bg_fill = palette.bg_secondary;
+    visuals.widgets.inactive.weak_bg_fill = palette.bg_secondary;
+    visuals.widgets.inactive.bg_stroke = egui::Stroke::new(1.0, palette.border);
+    visuals.widgets.inactive.fg_stroke = egui::Stroke::new(1.0, palette.text_primary);
+
+    visuals.widgets.hovered.bg_fill = palette.bg_tertiary;
+    visuals.widgets.hovered.weak_bg_fill = palette.bg_tertiary;
+    visuals.widgets.hovered.bg_stroke = egui::Stroke::new(1.5, palette.accent_primary);
+    visuals.widgets.hovered.fg_stroke = egui::Stroke::new(1.5, palette.text_primary);
+
+    // Active/clicked widgets
+    visuals.widgets.active.bg_fill = palette.accent_secondary;
+    visuals.widgets.active.weak_bg_fill = palette.accent_secondary;
+    visuals.widgets.active.bg_stroke = egui::Stroke::new(2.0, palette.accent_bright);
+    visuals.widgets.active.fg_stroke = egui::Stroke::new(2.0, palette.text_primary);
+
+    visuals.widgets.open.bg_fill = palette.accent_secondary;
+    visuals.widgets.open.weak_bg_fill = palette.accent_secondary;
+    visuals.widgets.open.bg_stroke = egui::Stroke::new(1.5, palette.accent_primary);
+    visuals.widgets.open.fg_stroke = egui::Stroke::new(1.5, palette.text_primary);
+
+    // Selection
+    visuals.selection.bg_fill = palette.selection;
+    visuals.selection.stroke = egui::Stroke::new(1.0, palette.accent_bright);
+
+    // Hyperlinks
+    visuals.hyperlink_color = palette.accent_bright;
+
+    // Window styling
+    visuals.window_rounding = egui::Rounding::same(8.0);
+    visuals.window_shadow = egui::epaint::Shadow {
+        offset: egui::vec2(0.0, 8.0),
+        blur: 20.0,
+        spread: 0.0,
+        color: egui::Color32::from_black_alpha(80),
+    };
+    visuals.window_stroke = egui::Stroke::new(1.0, palette.border);
+
+    // Popup styling
+    visuals.popup_shadow = egui::epaint::Shadow {
+        offset: egui::vec2(0.0, 4.0),
+        blur: 16.0,
+        spread: 0.0,
+        color: egui::Color32::from_black_alpha(100),
+    };
+
+    // Resize handle
+    visuals.resize_corner_size = 12.0;
+
+    // Menu rounding
+    visuals.menu_rounding = egui::Rounding::same(6.0);
+
+    // Indent guide
+    visuals.indent_has_left_vline = true;
+    visuals.striped = true;
+
+    // Borders and separators
+    visuals.window_stroke = egui::Stroke::new(1.0, palette.border);
+
+    // === Text styles with better readability ===
+    style.text_styles.insert(
+        egui::TextStyle::Body,
+        egui::FontId::proportional(14.0),
+    );
+    style.text_styles.insert(
+        egui::TextStyle::Button,
+        egui::FontId::proportional(14.0),
+    );
+    style.text_styles.insert(
+        egui::TextStyle::Heading,
+        egui::FontId::proportional(18.0),
+    );
+    style.text_styles.insert(
+        egui::TextStyle::Monospace,
+        egui::FontId::monospace(13.0),
+    );
+
+    // Apply the style
+    ctx.set_style(style);
+}
+
+/// Get the color palette for use in custom rendering
+pub fn get_palette() -> ColorPalette {
+    ColorPalette::dark_purple()
+}