That's a good question and a difficult one to answer. If you want a quick answer I think the colors in the instructions are correct.
Here's the long answer. We don't know the MM of this plane, but from the extended windscreen (the two thin rectangular glass panels aft of the windscreen), the plane is a late production machine built by Ambrosini (SAI). C.200s and C.202s were finished in both the early Serie Mimetica colors (until stocks were used up) and the Tavola X colors. Below two photos of C.200's finished in NC4+VOS2, the first was probably repainted after an overhaul, VOS2 is evident, and the second C.200 is from the factory, an SAI machine:
As a reference, below is a C.202 MM 7445, also built by SAI between Sept 1942 - June 1943 so we know this C.202 was finished in NC4+VOS2.
A color photo of a C.200 377-9 (SAI built) sitting nearby a C.202 wing, note the top surface color of the C.200 and the C.202 (Macchi built) wings (NC4).
Here's a lineup of C.200 wrecks, in the background is an Ambrosini C.200 next to a Breda C.200 NC4+VOS2 (also note Allied troops cut out the Savoy crests from every plane in this photo, for souvenirs.
364-7 has been discussed on this forum before, see the link below for photos and also see Jean's build in 1/48 as a general guide. btw Jean used the Serie Mimetica colors.
Macchi C.200 364-7
Note 364-7 lacks the fuselage fasces (don't use decal 9 in the PCM instructions), upper + lower wing fasces have a transparent background. As mentioned 364-7 is an Ambrosini machine so use the correct tail-cross as shown in the instruction profile, although the instructions are missing the decal (number) for this cross - don't use decal 13. Also note the white cross of Savoy 364-7 is missing the Savoy crest (in the middle of the white cross) on the real plane (decal 7 <-- don't use this decal). Check the decal sheet or you'll have to paint-on the Savoy cross yourself. Finally the Gigi Tre Osei unit badge is an early one with the bird wings that drift off the background disk at the edges. Mike Driskill points out that the prop blades on this machine were likely a light blue, see the Color guide for the FS number.
