Marrow is typically pink once the meat of a bone has been cooked...

pink/purple techniquly doesnt exist

Its just what our brain sees when there is no green

It was Cyan's love of pink that showed she has no place in the Blacks. It is only appropriate decoration when the pink is the blood-tinged bone of one's enemies. 

 

<.< Hehehe I think pink is a horid color. Why else would I use it to torture people?

And thank you Pank :) *slits her throat*

I knew I liked the color green for a reason!