diff --git a/src/gui.rs b/src/gui.rs
index 2efe9b4..379a906 100644
--- a/src/gui.rs
+++ b/src/gui.rs
@@ -2,10 +2,10 @@ use std::sync::mpsc::Sender;
 use std::sync::RwLock;
 
 use log::{info, warn};
-use pixels::wgpu::TextureFormat;
 use pixels::{Pixels, PixelsBuilder, SurfaceTexture};
+use pixels::wgpu::TextureFormat;
 use servicepoint2::{
-    ByteGrid, PixelGrid, PIXEL_HEIGHT, PIXEL_WIDTH, TILE_SIZE,
+    ByteGrid, PIXEL_HEIGHT, PIXEL_WIDTH, PixelGrid, TILE_SIZE,
 };
 use winit::application::ApplicationHandler;
 use winit::dpi::{LogicalSize, Size};
@@ -13,13 +13,15 @@ use winit::event::WindowEvent;
 use winit::event_loop::ActiveEventLoop;
 use winit::window::{Window, WindowId};
 
+use crate::Cli;
+
 pub struct App<'t> {
     display: &'t RwLock<PixelGrid>,
     luma: &'t RwLock<ByteGrid>,
     window: Option<Window>,
     pixels: Option<Pixels>,
     stop_udp_tx: Sender<()>,
-    spacers: bool,
+    cli: &'t Cli,
 }
 
 const SPACER_HEIGHT: u16 = 4;
@@ -35,7 +37,7 @@ impl<'t> App<'t> {
         display: &'t RwLock<PixelGrid>,
         luma: &'t RwLock<ByteGrid>,
         stop_udp_tx: Sender<()>,
-        spacers: bool,
+        cli: &'t Cli,
     ) -> Self {
         App {
             display,
@@ -43,14 +45,14 @@ impl<'t> App<'t> {
             stop_udp_tx,
             pixels: None,
             window: None,
-            spacers,
+            cli,
         }
     }
 }
 
 impl ApplicationHandler<AppEvents> for App<'_> {
     fn resumed(&mut self, event_loop: &ActiveEventLoop) {
-        let height = if self.spacers {
+        let height = if self.cli.spacers {
             let num_spacers = (PIXEL_HEIGHT / TILE_SIZE) - 1;
             PIXEL_HEIGHT + num_spacers * SPACER_HEIGHT
         } else {
@@ -122,7 +124,7 @@ impl ApplicationHandler<AppEvents> for App<'_> {
         let luma = self.luma.read().unwrap();
 
         for y in 0..PIXEL_HEIGHT as usize {
-            if self.spacers && y != 0 && y % TILE_SIZE as usize == 0 {
+            if self.cli.spacers && y != 0 && y % TILE_SIZE as usize == 0 {
                 // cannot just frame.skip(PIXEL_WIDTH as usize * SPACER_HEIGHT as usize) because of typing
                 for _ in 0..PIXEL_WIDTH as usize * SPACER_HEIGHT as usize {
                     frame.next().unwrap();
@@ -135,7 +137,12 @@ impl ApplicationHandler<AppEvents> for App<'_> {
                     luma.get(x / TILE_SIZE as usize, y / TILE_SIZE as usize);
 
                 let color = if is_set {
-                    [0u8, brightness, 0, 255]
+                    [
+                        if self.cli.red { brightness } else { 0u8 },
+                        if self.cli.green { brightness } else { 0u8 },
+                        if self.cli.blue { brightness } else { 0u8 },
+                        255,
+                    ]
                 } else {
                     [0u8, 0, 0, 255]
                 };
diff --git a/src/main.rs b/src/main.rs
index 30ceb35..367a2b1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -23,19 +23,28 @@ mod gui;
 
 #[derive(Parser, Debug)]
 struct Cli {
-    #[arg(short, long, default_value = "0.0.0.0:2342")]
+    #[arg(long, default_value = "0.0.0.0:2342")]
     bind: String,
     #[arg(short, long, default_value_t = false)]
     spacers: bool,
+    #[arg(short, long, default_value_t = false)]
+    red: bool,
+    #[arg(short, long, default_value_t = false)]
+    green: bool,
+    #[arg(short, long, default_value_t = false)]
+    blue: bool,
 }
 
 fn main() {
     env_logger::init();
 
-    let cli = Cli::parse();
-    info!("starting with args: {:?}", &cli);
+    let mut cli = Cli::parse();
+    if !(cli.red || cli.blue || cli.green) {
+        cli.green = true;
+    }
 
-    let socket = UdpSocket::bind(cli.bind).expect("could not bind socket");
+    info!("starting with args: {:?}", &cli);
+    let socket = UdpSocket::bind(&cli.bind).expect("could not bind socket");
     socket
         .set_nonblocking(true)
         .expect("could not enter non blocking mode");
@@ -46,16 +55,24 @@ fn main() {
         PIXEL_WIDTH as usize,
         PIXEL_HEIGHT as usize,
     ));
-    let display_ref = &display;
 
     let mut luma = ByteGrid::new(TILE_WIDTH as usize, TILE_HEIGHT as usize);
     luma.fill(u8::MAX);
     let luma = RwLock::new(luma);
-    let luma_ref = &luma;
 
+    run(&display, &luma, socket, font, &cli);
+}
+
+fn run(
+    display_ref: &RwLock<PixelGrid>,
+    luma_ref: &RwLock<ByteGrid>,
+    socket: UdpSocket,
+    font: BitmapFont,
+    cli: &Cli,
+) {
     let (stop_udp_tx, stop_udp_rx) = mpsc::channel();
 
-    let mut app = App::new(display_ref, luma_ref, stop_udp_tx, cli.spacers);
+    let mut app = App::new(display_ref, luma_ref, stop_udp_tx, cli);
 
     let event_loop = EventLoop::with_user_event()
         .build()