Hi Steve,
You will find your paint code in your service schedule.
When you purchased your vehicle, the dealer will stick the matrix of build codes on the inside of the front cover. Three lines below the 'California Comf. KR' line, you will see a code such as
"LH1W 0000 0000 RG"
This code is for my sand beige (2011).
So the paint code would read "LH1W/RG" for my sand beige and
"LA7W/8E" for a silver
"LC9X/2T" for deep black and "LO41/A1" for black etc... Please note these are 2011 codes so they may differ for other years.
Many paint scratch sites around. "Paintscratch.com" is one and if you get your paint code from your service book you should be able to get your scratch kit quickly...
Hope this helps!
Joe