Yorik Coloured Pencils. Yorik Coloured Pencils are specially manufactured for Mercurius. Their hexagonal and triangular shapes make them particularly suitable for smaller children as they facilitate the correct grip when learning how to hold a pencil. The pencils have soft leads and are very popular in schools. Plastic case, length: 175 mm, diam. 10 mm (length: 6.89 inch, diam. 0.39 inch), lead diam. 6.25 mm (0.25 inch), unlacquered, 12 crayons of one colour, 19 colours available. colour: 01 white | 03 yellow | 04 golden yellow | 05 orange | 06 vermilion | 07 red | 08 carmine red | 10 pink | 11 violet | 13 purple | 18 blue | 19 dark blue | 20 prussian blue | 22 apple green | 26 dark green | 30 red brown | 32 brown | 35 grey | 36 black