According to JAPANESE AIRCRAFT INTERIORS 1940-1945, by Robert C. Mikesh, there is not much info about the cockpit colors of these two aircraft, but I will quote what he says about each.
NAKAJIMA B5N2, KATE: "Specifics have not been recorded that pertain to this aircraft. As can be seen from the photographs, the pilots metal instrument panel is painted black. A dark green of some undetermined shade appears to have been used throughout the rest of the cockpit areas."
AICHI D3A2, VAL: "The remains of only one aircraft have been recently examined to determine interior colors...This aircraft...has severely deteriorated. The consistency with which no single color appears on the instrument panels is a good indication that tradition was followed in having these panels coated with a crinkled black finish."
"The unevenness with which the yellow primer coating was applied to the cockpit makes it difficult to distinguish between those parts which were painted separately as a sub-component, and those which were painted after assembly. In general, it would appear that the cockpit interior originally had an overall brighter green finish than later production aircraft, reported to be yellowish-green, which often describes N.2. Sub-assembled components added after the general interior painting had various shades of green. Communication equipment would have had the traditional black finish."
As you can see, you can use various shades of green in the cockpits of these aircraft without fear of contradiction.
However, there is no mention of the use of aotake in their cockpit interiors. Aotake is that elusive clear protective coating that appears as various shades of metalic blue-green when applied.