Scotweb Tartan Designer - weathered colors?

[SlackerDrummer]

Has anyone who has played around with Scotweb's Tartan Designer found suitable colors for rendering a tartan in weathered/reproduction colors? I am trying to see what a particular tartan would look like in this color pallet and I'm having a hard time getting it to look right.

[Guinness>water]

I turn my tartans into weathered ones all the time. Its pretty easy. Use weavers colors.
Black =(goes to) Charcoal grey
Blue = Morning grey
Green = Barley brown(brown in general)
Red = Redwood or terracotta
Yellow = Coopers yellow
White = muted white

Try that and tell me what you think.