Brian,
The question is more complex than just using color expression. The real problem is that the "current" object doesn't "know" anything about the other objects. You need some global attributes of the orders that indicate that an order is going to be used in a specific front end object - and use this attribute also to define color. Another possibility is to have a set of ten dynamic variables that lists order numbers that are contained in nine charts. I cannot suggest any more details, just trying to give an idea where to go...
As for the text color expression, it most likely will be a conditional expression like:
if(<condition based on order attributes>, rgb(r1,g1,b1), rgb(r2,g2,b2))
