This page shows most of the colour combinations, but it does not separate FE from FC. However, it does identify the colours that were available as single-tone (since they have their own trim number) and where the colours can be reversed (eg 276 & 277).
In addition to the wrinkles John mentioned, some colour combinations were deleted over the time FCs were in production, so not all were necessarily available in all of the 3 FC paint styles. The yellow/black Trax FC is a classic example: no FC ever left the GM-H factories looking like that, as the yellow/black combination was dropped in late 1958. All yellow/black FCs were painted in the initial style only - never just the insert like the Trax model.
Hope that helps in some way...
cheers
RET