diff --git a/source/color.c b/source/color.c
index bb27e80..a044b99 100644
--- a/source/color.c
+++ b/source/color.c
@@ -1,3 +1,8 @@
+/***
+The `gfx.color` module
+@module ctr.gfx.color
+@usage local color = require("ctr.gfx.color")
+*/
 #include <sf2d.h>
 
 #include <lua.h>
@@ -6,18 +11,33 @@
 u32 color_default = RGBA8(255, 255, 255, 255);
 u32 color_background = RGBA8(0, 0, 0, 255);
 
+/***
+Set a color as the default one.
+@function setDefault
+@tparam integer color the color to set as the default one.
+*/
 static int color_setDefault(lua_State *L) {
 	color_default = luaL_checkinteger(L, 1);
 
 	return 0;
 }
 
+/***
+Return the default color.
+@function getDefault
+@treturn integer default color
+*/
 static int color_getDefault(lua_State *L) {
 	lua_pushinteger(L, color_default);
 
 	return 1;
 }
 
+/***
+Set a color as the background one.
+@function setBackground
+@tparam integer color the color to set as the background one.
+*/
 static int color_setBackground(lua_State *L) {
 	color_background = luaL_checkinteger(L, 1);
 	sf2d_set_clear_color(color_background);
@@ -25,12 +45,26 @@ static int color_setBackground(lua_State *L) {
 	return 0;
 }
 
+/***
+Return the background color.
+@function getBackground
+@treturn integer background color
+*/
 static int color_getBackground(lua_State *L) {
 	lua_pushinteger(L, color_background);
 
 	return 1;
 }
 
+/***
+Return a color from red, green, blue and alpha values.
+@function RGBA8
+@tparam integer r the red value (0-255)
+@tparam integer g the green value (0-255)
+@tparam integer b the blue value (0-255)
+@tparam[opt=255] integer a the alpha (opacity) value (0-255)
+@treturn integer the color
+*/
 static int color_RGBA8(lua_State *L) {
 	int r = luaL_checkinteger(L, 1);
 	int g = luaL_checkinteger(L, 2);