Can I get a conversion chart so that I can use Sulky threads instead of the thread that the design calls for?

If you look under Resources of our website, you will see -  Color Conversion & Cross Reference.  You will find most of the major brand names cross-referenced to Sulky Threads.  Under the same Tab under Free Downloads, you will also find an RGB (Red/Blue/Green) conversion chart for those of you who seek that information.