diff --git a/CMakeLists.txt b/CMakeLists.txt
index 542c2b6..241f4b0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.27)
+cmake_minimum_required(VERSION 3.25)
 project(JGL
     VERSION 1.0
     LANGUAGES CXX
diff --git a/include/JGL/JGL.h b/include/JGL/JGL.h
index d68a30c..2b8cdcd 100644
--- a/include/JGL/JGL.h
+++ b/include/JGL/JGL.h
@@ -26,7 +26,18 @@ namespace JGL {
         int b;
     };
     namespace Colors {
-
+        static const Color3 BrightRed   {255,   0,   0};
+        static const Color3 BrightGreen {  0, 255,   0};
+        static const Color3 BrightBlue  {  0,   0, 255};
+        static const Color3 White       {255, 255, 255};
+        static const Color3 Black       {  0,   0,   0};
+        static const Color3 Gray        {128, 128, 128};
+        static const Color3 DarkGray    {192, 192, 192};
+        static const Color3 LightGray   { 64,  64,  64};
+        static const Color3 Maroon      {};
+        static const Color3 Fuchsia     {};
+        static const Color3 Lime        {};
+        static const Color3 Olive       {};
     }
     struct HSV {
         float hue;
@@ -37,6 +48,12 @@ namespace JGL {
     Vector2 ScreenToViewport(const Vector2& v)
     {
         // TODO: Implement matrix transformation
+        float x = v.x / 600.f;
+        float y = v.y / 600.f;
+
+        return {
+            x - .5f, y - .5f
+        };
     }
     Vector2 ViewportToScreen(const Vector2& v)
     {
diff --git a/main.cpp b/main.cpp
index 7f8a7fc..53f4379 100644
--- a/main.cpp
+++ b/main.cpp
@@ -42,7 +42,7 @@ void display() {
         glVertex2f(-0.9f, -0.3f);
     glEnd();
 
-    JGL::FillRect2D();
+    JGL::FillRect2D({64, 64}, {128, 128}, JGL::Colors::White);
 
     glBegin(GL_TRIANGLES);
         glColor3f(0.0f, 0.0f, 1.f); // Blue