There is a list, it's on the CND website. Have a look like rinn has suggested.
I never knew this!! :oIf you go to CND - Creative Nail Design, Professional Nail, Hand and Foot Beauty Products - Artificial Acrylic Nails and Brisa Gel. and click on tools and support, then shellac support you will find 3 sheet of shellac 'recipes' you can print off and recreate, the new shellac stand come with a neat shellac colour display that also has a section of layered colours.