convert colour to a 2 bit format

src/window/renderer.h

@@ -1,5 +1,6 @@
 #pragma once
 #include <SDL2/SDL.h>
+#include <stdint.h>
 
 #include "../game/game.h"
 
@@ -8,19 +9,6 @@
 #define BLOCK_WIDTH (SCREEN_WIDTH / COLUMNS)
 #define BLOCK_HEIGHT (SCREEN_HEIGHT / ROWS)
 
-// fits colours in a 3 bit length
-// 4th bit is unused
-typedef enum {
-    BLACK = 0,
-    RED = 1,
-    GREEN = 2,
-    BLUE = 4,
-    YELLOW = RED | GREEN,
-    CYAN = GREEN | BLUE,
-    MAGENTA = BLUE | RED,
-    WHITE = RED | GREEN | BLUE,
-} Colour;
-
 typedef struct {
     SDL_Window* window;
     SDL_Renderer* renderer;