diff --git a/src/gui.rs b/src/gui.rs
index 5c78fcc..943a947 100644
--- a/src/gui.rs
+++ b/src/gui.rs
@@ -1,4 +1,4 @@
-use eframe::egui::{self, RichText};
+use eframe::egui::{self, Color32, RichText};
 use serde_json::Value;
 use std::sync::mpsc;
 use std::thread;
@@ -10,6 +10,92 @@ fn pretty_json(text: &str) -> String {
     }
 }
 
+#[derive(Clone, Copy, PartialEq, Eq)]
+enum GuiTheme {
+    Ocean,
+    Cyberpunk,
+    Venom,
+    Rick,
+}
+
+impl GuiTheme {
+    fn all() -> &'static [GuiTheme] {
+        &[GuiTheme::Ocean, GuiTheme::Cyberpunk, GuiTheme::Venom, GuiTheme::Rick]
+    }
+    fn name(&self) -> &'static str {
+        match self {
+            GuiTheme::Ocean => "Ocean",
+            GuiTheme::Cyberpunk => "Cyberpunk 2077",
+            GuiTheme::Venom => "Venom",
+            GuiTheme::Rick => "Rick",
+        }
+    }
+    fn colors(&self) -> (Color32, Color32, Color32, Color32, Color32, Color32) {
+        match self {
+            GuiTheme::Ocean => (
+                Color32::from_rgb(0x0a, 0x0a, 0x0f),
+                Color32::from_rgb(0x12, 0x12, 0x1a),
+                Color32::from_rgb(0x1a, 0x1a, 0x24),
+                Color32::from_rgb(0x2a, 0x2a, 0x3a),
+                Color32::from_rgb(0x00, 0xe5, 0xff),
+                Color32::from_rgb(0xe0, 0xe0, 0xe8),
+            ),
+            GuiTheme::Cyberpunk => (
+                Color32::from_rgb(0x0a, 0x02, 0x08),
+                Color32::from_rgb(0x0f, 0x04, 0x16),
+                Color32::from_rgb(0x1a, 0x0a, 0x24),
+                Color32::from_rgb(0x2b, 0x4e, 0x76),
+                Color32::from_rgb(0xa7, 0x21, 0xbe),
+                Color32::from_rgb(0xe8, 0xe0, 0xea),
+            ),
+            GuiTheme::Venom => (
+                Color32::from_rgb(0x00, 0x00, 0x00),
+                Color32::from_rgb(0x05, 0x05, 0x05),
+                Color32::from_rgb(0x0e, 0x0e, 0x0e),
+                Color32::from_rgb(0x1a, 0x1a, 0x1a),
+                Color32::from_rgb(0xea, 0xea, 0xea),
+                Color32::from_rgb(0xea, 0xea, 0xea),
+            ),
+            GuiTheme::Rick => (
+                Color32::from_rgb(0x00, 0x00, 0x00),
+                Color32::from_rgb(0x02, 0x04, 0x02),
+                Color32::from_rgb(0x08, 0x0a, 0x06),
+                Color32::from_rgb(0x1a, 0x30, 0x14),
+                Color32::from_rgb(0x9d, 0xd6, 0x3b),
+                Color32::from_rgb(0xda, 0xf0, 0xc8),
+            ),
+        }
+    }
+    fn apply(&self, ctx: &egui::Context) {
+        let (bg, surface, surface2, border, accent, text) = self.colors();
+        let mut v = egui::Visuals::dark();
+        v.override_text_color = Some(text);
+        v.extreme_bg_color = bg;
+        v.window_fill = surface;
+        v.panel_fill = surface;
+        v.faint_bg_color = surface2;
+        v.code_bg_color = surface2;
+        v.hyperlink_color = accent;
+        v.selection = egui::style::Selection {
+            bg_fill: accent.linear_multiply(0.3),
+            stroke: egui::Stroke::new(1.0, accent),
+        };
+        v.widgets.noninteractive.bg_fill = surface2;
+        v.widgets.noninteractive.weak_bg_fill = surface;
+        v.widgets.noninteractive.bg_stroke = egui::Stroke::new(1.0, border);
+        v.widgets.inactive.bg_fill = surface2;
+        v.widgets.inactive.weak_bg_fill = surface;
+        v.widgets.inactive.bg_stroke = egui::Stroke::new(1.0, border);
+        v.widgets.hovered.bg_fill = accent.linear_multiply(0.15);
+        v.widgets.hovered.bg_stroke = egui::Stroke::new(1.0, accent);
+        v.widgets.hovered.fg_stroke = egui::Stroke::new(1.5, accent);
+        v.widgets.active.bg_fill = accent.linear_multiply(0.25);
+        v.widgets.active.bg_stroke = egui::Stroke::new(1.0, accent);
+        v.widgets.active.fg_stroke = egui::Stroke::new(2.0, accent);
+        ctx.set_visuals(v);
+    }
+}
+
 pub fn run_gui(server_url: &str) {
     let options = eframe::NativeOptions {
         viewport: egui::ViewportBuilder::default()
@@ -71,6 +157,7 @@ type Msg = (String, GuiMsg);
 struct AirustGui {
     server_url: String,
     mode: AppMode,
+    theme: GuiTheme,
     active_tab: Tab,
     chat_input: String,
     chat_log: String,
@@ -106,6 +193,7 @@ impl AirustGui {
         Self {
             server_url: server_url.to_string(),
             mode: AppMode::Startup,
+            theme: GuiTheme::Ocean,
             active_tab: Tab::Chat,
             chat_input: String::new(),
             chat_log: String::from("AiRust — Cyber Operator\n\n"),
@@ -187,6 +275,8 @@ impl AirustGui {
 
 impl eframe::App for AirustGui {
     fn ui(&mut self, ui: &mut egui::Ui, _frame: &mut eframe::Frame) {
+        self.theme.apply(ui.ctx());
+
         while let Ok((label, msg)) = self.rx.try_recv() {
             let target = match msg {
                 GuiMsg::Set(t) => t,
@@ -284,6 +374,19 @@ impl AirustGui {
                         *active = *tab;
                     }
                 }
+                ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
+                    ui.label(RichText::new("Theme:").size(12.0));
+                    egui::ComboBox::from_id_salt("theme_combo")
+                        .selected_text(self.theme.name())
+                        .width(130.0)
+                        .show_ui(ui, |ui| {
+                            for t in GuiTheme::all() {
+                                if ui.selectable_label(*t == self.theme, t.name()).clicked() {
+                                    self.theme = *t;
+                                }
+                            }
+                        });
+                });
             });
         });
 
diff --git a/target/debug/.fingerprint/AiRust-301136bf2d3c6683/dep-bin-AiRust-cli b/target/debug/.fingerprint/AiRust-301136bf2d3c6683/dep-bin-AiRust-cli
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diff --git a/target/debug/AiRust-cli.exe b/target/debug/AiRust-cli.exe
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diff --git a/target/debug/AiRust_cli.pdb b/target/debug/AiRust_cli.pdb
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diff --git a/target/debug/deps/AiRust_cli.exe b/target/debug/deps/AiRust_cli.exe
index 87a8389..3294ab0 100644
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diff --git a/target/debug/deps/AiRust_cli.pdb b/target/debug/deps/AiRust_cli.pdb
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