A red coloured pencil.

I chose red, a rich velvety red, to colour the title in. It involved many rotations of the sharpener to get the thing done. What remained of the pencil was less than half of the original unblemished length. When mum discovered it, she was really unhappy that I had used it so exclusively. The precious set was now unbalanced - the rainbow rank interrupted by a much shorter member. What ensued was the biggest fight we ever had, before or since.