Something else that I want to add to earlier discussion. I started looking into 1941 camouflage not so much looking for "What USS ARIZONA was painted on 7 December 1941", rather I was interested in how certain destroyers involved in a series of camo experiments were painted and when they painted out of those schemes.
One of the very few color images surviving of one batch of destroyers painted in various camo schemes, was this one (80-GK-14467) of DesDiv 6 at San Diego NAS in October 1941. I couldn't quite understand why they were still painted in these schemes applied back in the early summer of 1941 and why they were at the San Diego NAS pier. In research through deck logs I found out that this group of destroyers (USS CLARK (DD-361) and DesDiv 6) arrived at NAS San Diego on 13 October 1941 and that from the order the destroyers are moored together, from the pier out -
USS CLARK, USS CASE, USS CUMMINGS, USS SHAW, and USS TUCKER, the date of this photo occurred during the 13-19 October 1941 period. USS CLARK departed and went to MINY for an overhaul and alterations. The DesDiv 6 destroyers left in early November and returned to Pearl Harbor. DesDiv 6 destroyers were at NAS San Diego solely to be degaussed. Apparently there wasn't such a facility at Pearl harbor at the time. As best I can tell the four destroyers in DesDiv 6, USS CUMMINGS (DD-365), USS CASE (DD370), USS SHAW (DD-373), and USS TUCKER (DD-374), remained painted in their experimental and now obsolete camo schemes until receiving overhauls scheduled to happen (and was in the process for some) in early December 1941.
DesDiv 6 camo schemes were;
USS CUMMINGS (DD-365) ... Ms 1 (Dark Gray 5-D)
USS CASE (DD-370) ... Ms 3 (Light Gray 5-L with Ms 5 painted false bow wave)
USS SHAW (DD-373) ...Ms 2 (Modified Graded System)
USS TUCKER (DD-374) ... Ms 1 modified (a lighter shade of Dark Gray)
So what scheme was USS SHAW painted at the time she blew-up while in floating drydock on 7 December 1941? Even from the fire damage to her forward half, she doesn't appear to still be painted in a Graded scheme. From official directives, she should be painted in either Ms 11 using either 5-S or 5-N.