Stefan has added a whole bunch of new colors to Graal v6. iPhone runs using Graal v6, so I don't know why he hasn't released them on there yet. Maybe he is waiting until the PC version has them too  |
I think it's possible iOS clients can use custom colours but they aren't saved. They are seemingly in testing mode at the moment as only you can see the new colours and they seem to revert to black when you relogin.
He added all the standard HTML colour names (
http://www.w3schools.com/html/html_colornames.asp)
So soon hopefully
