melted_snowball says he had a moment of white-board marker envy today.
A colleague has four white-board marker colours that he's not seen before: Charteruse, Magenta, Light Orange, and Turquoise.
He wondered whether he might be able to find another colour, along with those four, and raise the ante.
This is a project I could get behind. I know you can get refillable dry-erase marker casings. I wonder about the chemistry of dry-erase ink, and whether a chemist might be able to produce a new colour on spec. Right now I'm thinking a dun or tan colour would be neat.