Here is a book available at
http://www.gotcs.com/
It lists every color of every brand of paint on the market. It gives the formula for each and is cross referenced.
For example, you can take your favorite Winsor Newton Naples Yellow and it will give you the formula for mixing this exact color using Genesis. Ditto for Rembrandt's Greenish Umber, etc.
The point I am trying to make is that although I use Genesis, I do still use my original palette of colors.