@Mark and archmage: thanks for the kind words
@Gameboy:
I thought this purple thing was in medieval europe later on?
Or was it also a known color in ancient egypt?
Update:
All info I can found is about something called lapis lazuli a blue color ( used to color luxury things, not clothes )
and green malachit crashed to powder to color the womans eyes. But I cannot find anything about purple.
Update2:
OK, I found something. The phoenicians are the ones who discover how to make the purple color from snails.
They lived side by side with the ancient egypts in the eastern mediterranean region. So I think purple was known.
Nevertheless I'm still not shure if I will use it