Linking liveries and vehicle colors?

(My first time posting here so sorry if I'm making zero sense)

Basically I'm creating new graphics for some trucks. There are 6 different designs for the sides of the truck, each are different colors/styles. At the moment I've just set the color of the truck itself to white so it looks okay with all 6 designs.

I'm wondering if there is a way to link each livery to a different color set? So for example, the graphics on the side of the truck are yellow, so I want the rest of the truck to be yellow? 

For example, I've been using the Yankee.

So for this I'd want the white areas to be green. It's set as extra_2.

Then for each of the other "extra_ " components, they'd have their own color schemes.

So if the Yankee spawned with "extra_5" graphics on the side, it would only be spawn in the color that matched the graphics.

Hope that makes sense.