HAH! I looked it up and there is a cat breed called chartreux.. and it is.... grey(-blue) !! Like the russian blue :)
Guess my mind got it from somewhere !!
Really all the names come frome somewhere, some were just named more recent or are still more recognisable than others. I am not gonna go through the etymolgy of all of them ( but a few years ago I looked them all up) But some come from the regions some people heard or saw it from (like it happens with foodstuff too) and sometimes after the substance it was made from.
Crimson/carmine for instance are named after the insects it is made from. And it is also used as foodcoloring.. so if you eat food with E120 you are eating crushed scale insects..
And I just found out that the word aubergine actually comes from the arabic word for eggplant ! Now that is new :)