The Search for a Colour Palette

As you come home from a long journey to see your son once more, you discover he is gone. A castle has been presumably summoned from thin air and it has a dark, gloomy presence to it. With this castle appearing, all the colours also disappeared, leaving everything looking lifeless. You hear a woman's voice in your head, beckoning you toward the castle. After grabbing your ancient shield and trusty boomerang you go towards an adventure that you simply don't know how will end. All you know is that ...