diff --git a/Cargo.lock b/Cargo.lock
index 726452f..7000ca4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1119,7 +1119,7 @@ dependencies = [
 
 [[package]]
 name = "gb-emu"
-version = "0.3.2"
+version = "0.3.3"
 dependencies = [
  "clap",
  "cpal",
@@ -1136,7 +1136,7 @@ dependencies = [
 
 [[package]]
 name = "gb-emu-lib"
-version = "0.3.2"
+version = "0.3.3"
 dependencies = [
  "async-ringbuf",
  "bytemuck",
@@ -2965,7 +2965,7 @@ checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
 [[package]]
 name = "vst"
-version = "0.3.2"
+version = "0.3.3"
 dependencies = [
  "async-ringbuf",
  "baseview",
diff --git a/gb-emu/Cargo.toml b/gb-emu/Cargo.toml
index a067414..4328272 100644
--- a/gb-emu/Cargo.toml
+++ b/gb-emu/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "gb-emu"
-version = "0.3.2"
+version = "0.3.3"
 edition = "2021"
 
 [features]
diff --git a/gb-vst/Cargo.toml b/gb-vst/Cargo.toml
index 150771f..b25ddd3 100644
--- a/gb-vst/Cargo.toml
+++ b/gb-vst/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "vst"
-version = "0.3.2"
+version = "0.3.3"
 edition = "2021"
 
 [lib]
diff --git a/lib/Cargo.toml b/lib/Cargo.toml
index aba1e95..84d49d1 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "gb-emu-lib"
-version = "0.3.2"
+version = "0.3.3"
 edition = "2021"
 
 [features]
diff --git a/lib/src/constants.rs b/lib/src/constants.rs
index c7d16e5..708dcd6 100644
--- a/lib/src/constants.rs
+++ b/lib/src/constants.rs
@@ -1,2 +1,21 @@
+use crate::connect::Colour;
+
 // Hz
 pub const CLOCK_SPEED: usize = 4194304;
+
+pub(crate) const ERROR_COLOUR: Colour = Colour(0xFF, 0x00, 0x00);
+
+pub(crate) mod dmg_colours {
+    use crate::connect::Colour;
+    // validation b&w (dmg-acid2 etc.)
+    // pub(crate) const ZERO: Colour = Colour(0xFF, 0xFF, 0xFF);
+    // pub(crate) const ONE: Colour = Colour(0xAA, 0xAA, 0xAA);
+    // pub(crate) const TWO: Colour = Colour(0x55, 0x55, 0x55);
+    // pub(crate) const THREE: Colour = Colour(0x00, 0x00, 0x00);
+
+    // from https://www.designpieces.com/palette/game-boy-original-color-palette-hex-and-rgb/
+    pub(crate) const ZERO: Colour = Colour(0x9B, 0xBC, 0x0F);
+    pub(crate) const ONE: Colour = Colour(0x8B, 0xAC, 0x0F);
+    pub(crate) const TWO: Colour = Colour(0x30, 0x62, 0x30);
+    pub(crate) const THREE: Colour = Colour(0x0F, 0x38, 0x0F);
+}
diff --git a/lib/src/processor/memory/mmio/gpu/types.rs b/lib/src/processor/memory/mmio/gpu/types.rs
index e7e3eb6..d7027e4 100644
--- a/lib/src/processor/memory/mmio/gpu/types.rs
+++ b/lib/src/processor/memory/mmio/gpu/types.rs
@@ -2,6 +2,7 @@ use bytemuck::from_bytes;
 use serde::{Deserialize, Serialize};
 
 use crate::{
+    constants::{dmg_colours, ERROR_COLOUR},
     processor::memory::addresses::{OamAddress, VramAddress},
     util::{as_signed, get_bit, SaturatingCast},
 };
@@ -100,7 +101,7 @@ pub enum ColourInner {
     Error = 255,
 }
 
-pub struct Colour(u8, u8, u8);
+pub struct Colour(pub u8, pub u8, pub u8);
 
 impl From<Colour> for u32 {
     fn from(value: Colour) -> Self {
@@ -145,24 +146,24 @@ impl ColourInner {
     ) -> Colour {
         if let Some((cgb_palette, pallete_num)) = cgb_data {
             if *self == ColourInner::Error {
-                return Colour(0xFF, 0, 0);
+                return ERROR_COLOUR;
             }
             let offset: usize = (pallete_num as usize * 2 * 4) + (*self as usize * 2);
 
             rgb_from_bytes(*from_bytes(&cgb_palette.data[offset..=offset + 1]))
         } else {
             match self {
-                ColourInner::Zero => Colour(0xFF, 0xFF, 0xFF),
-                ColourInner::One => Colour(0xAA, 0xAA, 0xAA),
-                ColourInner::Two => Colour(0x55, 0x55, 0x55),
-                ColourInner::Three => Colour(0x00, 0x00, 0x00),
+                ColourInner::Zero => dmg_colours::ZERO,
+                ColourInner::One => dmg_colours::ONE,
+                ColourInner::Two => dmg_colours::TWO,
+                ColourInner::Three => dmg_colours::THREE,
                 ColourInner::Error => {
                     if cfg!(debug_assertions) {
-                        Colour(0xFF, 0x00, 0x00)
+                        ERROR_COLOUR
                     } else if is_cgb_mode {
                         rgb_from_bytes(0xFFFF)
                     } else {
-                        Colour(0xFF, 0xFF, 0xFF)
+                        dmg_colours::ZERO
                     }
                 }
             }