Apply Visual Theme after Filter is applied

Noticing couple of things when it comes to visual colors:

1. Theme Colors are applied after a visual level filter is applied.
   Ex: If my color pallete has Red, White and Blue (in that order) and in a stacked bar visual which has below data and I apply top two Customers based on value, only Red and Blue appear. I would prefer if the color is applied after the visual level filter where Red and White appears instead, same order as my theme/color pallete. Is this possible?
   

   Customer	Value
   CustomerA	100
   CustomerB	50
   CustomerC	200

2. Colors are always based on Category and are always ascending.
   Ex: In the above data, CustomerA is always Red, Customer B is always White and CustomerC is always Blue. Is there a way to change these colors based on value instead. Top Value Customer is Red, second value is white and third value is blue. Essentially following the color pallete in my theme. Is this possible?

This is just and example, I have charts that display top 15 customers and customer list changes based on other filters.