I took some time and did alot of research! This is a collaboration from many sites and blogs to come up with my chart. It is not my work, just a collection I put together. It matches CTMH colors to SU colors (not all included) to what Colors for Copics and then the RGB print codes to match. I only matched the 60 current Colors of CTMH to SU colors, there are more colors for stampin up that i did discover. I also, couldn't find some copic colors for SU. If you happen to have the ones missing please feel free to post!
I created an Excel Sheet that if you'd like you can download here
Color Comparison Chart