diff --git a/src/kernel/klog.rs b/src/kernel/klog.rs
index 8cc5416..756d84d 100644
--- a/src/kernel/klog.rs
+++ b/src/kernel/klog.rs
@@ -41,7 +41,7 @@ impl KernelLogger {
     pub fn fatal(&mut self, msg: Message) {
         let msg = MessageBuilder::new()
             .message("Fatal: ")
-            .foreground_color(Color(0xee, 0xa, 0xa))
+            .foreground_color(Color::RED)
             .append(MessageBuilder::from_message(msg))
             .build();
         self.fatal_queue.push((SystemTime::now(), msg));
@@ -50,7 +50,7 @@ impl KernelLogger {
     pub fn error(&mut self, msg: Message) {
         let msg = MessageBuilder::new()
             .message("Error: ")
-            .foreground_color(Color(0xaa, 0x22, 0x22))
+            .foreground_color(Color::ORANGE)
             .append(MessageBuilder::from_message(msg))
             .build();
         self.error_queue.push((SystemTime::now(), msg));
@@ -59,7 +59,7 @@ impl KernelLogger {
     pub fn warning(&mut self, msg: Message) {
         let msg = MessageBuilder::new()
             .message("Warning: ")
-            .foreground_color(Color(0xaa, 0xa, 0xaa))
+            .foreground_color(Color::PURPLE)
             .append(MessageBuilder::from_message(msg))
             .build();
         self.warning_queue.push((SystemTime::now(), msg));
@@ -68,7 +68,7 @@ impl KernelLogger {
     pub fn info(&mut self, msg: Message) {
         let msg = MessageBuilder::new()
             .message("Info: ")
-            .foreground_color(Color(0xa, 0xee, 0xa))
+            .foreground_color(Color::GREEN)
             .append(MessageBuilder::from_message(msg))
             .build();
         self.info_queue.push((SystemTime::now(), msg));
@@ -77,7 +77,7 @@ impl KernelLogger {
     pub fn debug(&mut self, msg: Message) {
         let msg = MessageBuilder::new()
             .message("Debug: ")
-            .foreground_color(Color(0xee, 0xee, 0xee))
+            .foreground_color(Color::WHITE)
             .append(MessageBuilder::from_message(msg))
             .build();
         self.debug_queue.push((SystemTime::now(), msg));
@@ -86,7 +86,7 @@ impl KernelLogger {
     pub fn trace(&mut self, msg: Message) {
         let msg = MessageBuilder::new()
             .message("Trace: ")
-            .foreground_color(Color(0xee, 0xee, 0xee))
+            .foreground_color(Color::WHITE)
             .append(MessageBuilder::from_message(msg))
             .build();
         self.trace_queue.push((SystemTime::now(), msg));
diff --git a/src/kernel/main.rs b/src/kernel/main.rs
index aa74b88..d50d8b1 100644
--- a/src/kernel/main.rs
+++ b/src/kernel/main.rs
@@ -13,7 +13,7 @@ extern "C" fn kmain_rust() -> ! {
     logger.info(message!(
         Msg("Hello, "),
         Msg("Metaverse"),
-        FgColor(Color(0xa, 0xee, 0xa)),
+        FgColor(Color::GREEN),
         Msg("!\n")
     ));
     for msg in logger.iter(LoggerLevel::Info) {
diff --git a/src/kernel/tty/tty.rs b/src/kernel/tty/tty.rs
index 38922ee..50b1470 100644
--- a/src/kernel/tty/tty.rs
+++ b/src/kernel/tty/tty.rs
@@ -7,21 +7,21 @@ use alloc::{
 };
 
 extern "C" {
-    fn tty_new(tty_type: u8, mode: u8) -> *mut u8;
-    fn tty_get(id: usize) -> *mut *mut u8;
-    fn tty_text_print(ttyx: *mut u8, string: *mut u8, color: u32, bgcolor: u32);
-    fn tty_get_id(tty: *mut u8) -> usize;
+    pub fn tty_new(tty_type: u8, mode: u8) -> *mut u8;
+    pub fn tty_get(id: usize) -> *mut *mut u8;
+    pub fn tty_text_print(ttyx: *mut u8, string: *mut u8, color: u32, bgcolor: u32);
+    pub fn tty_get_id(tty: *mut u8) -> usize;
 
-    fn tty_get_width(tty: *mut u8) -> usize;
-    fn tty_get_height(tty: *mut u8) -> usize;
+    pub fn tty_get_width(tty: *mut u8) -> usize;
+    pub fn tty_get_height(tty: *mut u8) -> usize;
 
-    fn tty_get_type(tty: *mut u8) -> u8;
-    fn tty_get_mode(tty: *mut u8) -> u8;
+    pub fn tty_get_type(tty: *mut u8) -> u8;
+    pub fn tty_get_mode(tty: *mut u8) -> u8;
 
-    fn tty_is_enabled(tty: *mut u8) -> bool;
+    pub fn tty_is_enabled(tty: *mut u8) -> bool;
 
-    fn tty_enable(tty: *mut u8) -> bool;
-    fn tty_disable(tty: *mut u8);
+    pub fn tty_enable(tty: *mut u8) -> bool;
+    pub fn tty_disable(tty: *mut u8);
 }
 
 pub enum Type {
@@ -144,6 +144,18 @@ impl Tty {
 #[derive(Clone, Copy)]
 pub struct Color(pub u8, pub u8, pub u8);
 
+impl Color {
+    pub const WHITE: Color = Color(0xee, 0xee, 0xee);
+    pub const BLACK: Color = Color(0, 0, 0);
+    pub const RED: Color = Color(0xee, 0x22, 0x22);
+    pub const GREEN: Color = Color(0x22, 0xee, 0x22);
+    pub const BLUE: Color = Color(0x22, 0x22, 0xee);
+    pub const YELLOW: Color = Color(0xee, 0x22, 0x22);
+    pub const ORANGE: Color = Color(0xee, 0xee, 0x22);
+    pub const PURPLE: Color = Color(0xee, 0, 0xee);
+    pub const PINK: Color = Color(0xee, 0x44, 0x66);
+}
+
 impl From<Color> for u32 {
     fn from(value: Color) -> Self {
         let res = (value.0 as u32) << 16 | (value.1 as u32) << 8 | (value.2 as u32);