This reminds me of a template I created for a client a long time ago.
As part of a master template system, the same result can be achieved straight out of elevation windows. The colored elements must have an applied material that references a solid vectorial hatch. Then, depending on the type of element it is, you can basically set the elevation pen to whichever color you wish.
This is imported into PlotMaker and grouped to an overlaid line elevation that has no hatching and all pens mapped to one or a few colors (usually black or shades of grey), with appropriately layered display orders.
This method eliminates the need to go to the 3D window and resize any images. It can also be pre-linked, so no ongoing maintenance is needed. In essence it is automatic, but I would only recommend trying it if you produce these colored elevations all the time.
I must mention that pushing the limits like this does highlight the weaknesses of the program!
Cheers,
Link.