Liz,

There is one colour that can only be imagined "Isabella". Apparantly one of the Spanish queens (or princesses, I can't remember which) took a vow not to change or wash her shift until a some town or other, lost in battle was recovered. It took something like three years, the colour refers to the colour of the linen on removal.
I don't think I'll paint my living room Isabella.

Walrus (Sorry for the lack of detail, but my memory has gone on strike)