Guys,
Here's a link:
[url=http://www.thepiper.com/fiberart/koolaid/:3468c]http://www.thepiper.com/fiberart/koolaid/[/url:3468c]
Yes, the colors do hold up. How long however, I giess depends on exposure, climate and all other factors. That's true of most dyed materials, especially naturals.
Allan