Sorry to disappoint You, but SB/FD style does not allow to represent this livery that way - too many shades, by a margin of... well... like 2000 or so.
Take that big "125" for example - since it's on a flat surface, You should need only ONE shade for pretty much all of it, plus another, darker, for outline of these two hatches on the bottom.
Of these small background "125"s - each of them should be made in one shade only. Granted, because of the design, there might be a number of variations of these shades, but only one per number. And so on, and so on...