Added the rest of the primary colors.

src/render/Pixel.cpp

@@ -33,4 +33,9 @@ CONST_COLOR(White, 255, 255, 255);
 CONST_COLOR(Red, 255, 0, 0);
 CONST_COLOR(Green, 0, 255, 0);
 CONST_COLOR(Blue, 0, 0, 255);
+
+CONST_COLOR(Yellow, 255, 255, 0);
+CONST_COLOR(Cyan, 0, 255, 255);
+CONST_COLOR(Magenta, 255, 0, 255);
+
 #undef CONST_COLOR

src/render/Pixel.h

@@ -43,6 +43,9 @@ namespace WalrusRPG
         extern const Pixel Red;
         extern const Pixel Green;
         extern const Pixel Blue;
+        extern const Pixel Yellow;
+        extern const Pixel Cyan;
+        extern const Pixel Magenta;
     }
 }