The color shade code matches for all products! Lets say you selected the shade IC420. All the products that have that shade code will have the same type of IC420 code in the drop down.

For example:
   IC420   =   Loose Mineral Foundation for Normal Skin
4-IC420   =   MSM Concealer
6-IC420   =  Loose Mineral Foundation for Oily Skin
5-IC420   =   Zit Zapper Daytime