Write in any colour that you see (scan)

The Colour Picker pen by Korean designer Jinsu Park works just like the eyedropper tool in Photoshop. Use the rear end of the pen to scan the colour of the objects around you, and then pen imitates the colour by mixing red, green and blue ink, thus negating the need for an arsenal of crayons

Unfortunately you can’t buy this pen yet as it is still conceptual, but if it ever hits the market I know a few designers that will want to have one.

found here