Checked out the data in Monogram Pubs U.S. Navy/Marine Corps markings and colors reference.
The Pearl vindicators would have been finished in ANA 602 light grey. There is no FS number for this color. However, 602 was later merged to ANA 620 light
gull grey, FS number 36440. Light grey was the bottom camoflage color in the
two tone scheme which was prevelant during the early war year(s). The only recorded combat use of the Vindicator in U.S. service occurred at Midway .
Six -3's of VMSB-241 along with SBD's attacked the Japanese heavy cruisers
Mikuma and Mogami, the SB2 squadron commander crashing his stricken and burning aircraft into the Mikuma's aft turret. The Mikuma was sunk the following day by dive bombers (SBD's) from Enterprise and Hornet.
Hope this helps.
P.S. I enjoyed the "black" humor! Dark charcoal grey, indeed!
Don't mean nothin'