FCPX, Davinci Resolve and Premiere don't display that kind of data as far as I know.
For those coming late to this thread, let me attempt a short summary:
For great colors using the Sony cameras (A7, A7II, A6300/6500 line), you really need to shoot with powerful video lights (WB manually set based on the color of your lights). To allow the lights to compete with the ambient light, you're best off shooting early in the morning or in the last hours before sunset when there is less overall ambient light or at depth (30+ meters) where again there is less ambient light to outcompete. Under these circumstances, it helps to underexpose the background around -0.7 to -1.3 EV to get nice richly saturated blues while adjusting the strength of your lights to avoid overexposing the subjects (use the zebras to check for overexposure.)
There's no need to shoot in SLOG or any of the cinegammas if you apply the above exposure principles, as the dynamic range of your scene will fit well within the 7-8 stops of exposure you get under standard picture modes or REC709.
Forget about trying to shoot without lights and doing a manual white balance. Your results will be disappointing unless you're in very clear water and very shallow (5-10m max). In those circumstances, the Underwater Auto White Balance mode can work ok.
My experiments using red filters and manual white balance have been pretty frustrating and disappointing overall, so it's not an option I would recommend.