Hi,
This pattern calls for "Crescent" floss which I believe is called "Classic Colorworks" floss. There is a conversion chart of Classic Colorworks floss to DMC floss on a website called "stitchesnthings.com".
Read their wording carefully since they do warn that the DMC floss colors will not be an exact match.
I'm not an employee of ECS but a stitcher that saw your "chat". Question.. hope this helps! :)