The old color didn't match the new branding, but it really doesn't seem like the new one matches the branding either. Hopefully this won't be the last change to the folder icon color.
You can download the new icons from HERE (if you're using Lucid, simply run "sudo apt-get update && sudo apt-get upgrade" and you'll get the new icons).
You can download the new icons from HERE (if you're using Lucid, simply run "sudo apt-get update && sudo apt-get upgrade" and you'll get the new icons).