Allan:

if you want to see why is not displaying the color as you designed open the class as a table and browse the properties of the diferent control in your class. You will see that only have saved the columns of your grid.

If you want to see how the dynamicbackcolor works. Try to create a grid using the builder and select the style ledger then check the properties of the column and you will see how they format this property to get the color they want.