The Chromatic Typewriter is a conceptual art piece by Tyree Callahan. The Bellingham, Washington-based artist modified a 1937 Underwood Standard typewriter, replacing the letters and keys with different colours and associated pads. The typewriter was entered into the 2012 West Prize competition and since then it has exploded in popularity online. Prints are now available (more info here) and the response has been overwhelmingly positive for the painter.