In case if you use different brands of embroidery floss and sometimes you need to transfer DMC to Anchor or Madeira to DMC - you can use this table to find the corresponding color codes for each brand. There is also column for Gamma threads.

https://docs.google.com/spreadsheets/d/112XcaQA4i-F0mwf_QoaduaetmraSu1ahx0vqX8-qCxA/edit?usp=sharing

Which brand do you use usually?