I have had 3 Ferraris with yellow calibers and yellow shields, 2 of those with yellow dials, yellow seatbelts and yellow piping inside even, the different shades of yellow never bothered me or even catches my attention, they worked together quite harmoniously. I mean, a red car will have different shades of red on it all over depending on where the lighting comes from, that never bothered anyone did it?
IMO, I say your original configuration, looks the best and the most classy. Ferrari's badge is yellow so that dictates one of the colours on the car has to be yellow, might as well compliment it. Blue goes well with yellow with the contrast.
Secondary choice of caliber colour is black. But for me, I only chose black as the last resort so they don't clash with any other colours on the car.
I wouldn't pick silver cause the caliber silver is a different shade of silver than the wheels so the eyes will naturally drawn to that difference and that became the focal point whenever you look at the car. On the other hand, the yellow in the Ferrari wheel cap, the yellow on the caliber and the yellow on the shield are separate by another colour, your eyes won't compare the different shades directly as the colours in between changed the perception of the shades of yellow.
I still like the Roma, if I were to do one it would have been Nero Daytona with Nero interior and yellow piping and yellow calibers and either silver wheels or black wheels. Some shade of blue with some shade of tan interior would have been my second choice, like something similar to yours. Ferrari's blues are amazing.
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