Of all the camouflage schemes worn by Flying Fortresses in WWII, perhaps the most interesting was applied at the Hawaiian Air Depot in the aftermath of the Pearl Harbor attack. This scheme was authorized on 10DEC41 and was designed to conceal aircraft on the ground. The Dark Olive Drab 41 upper surfaces were broken up with Sand 26, Neutral Gray 43, Rust Brown 34, and Interior Green areas. Rudders were given thirteen alternating red and white stripes, and red-centered US insignia were carried in six positions. Serial Numbers were painted on the vertical stabilizers in yellow, although this does not appear to have happened right away in all cases. No two camouflages were exactly alike but photographs of HAD scheme Boeing B-17Es show similar patterns were applied. No definitive records have surfaced which conclusively identify which aircraft were repainted so photographs showing tail numbers or identifiable camouflage patterns are the best evidence.
While photographs of HAD scheme B-17Es are rare, it is especially difficult to find such pictures of B-17C/Ds. What photographs are available show more chaotic patterns and rarely are the tail numbers discernible. More questions than answers, but some progress can be made.
One of the more obvious questions is just how many B-17C/Ds could have been camouflaged at the Hawaiian Air Depot in the first place? Several B-17s were destroyed in the raid, so this number is limited to ships which survived the Japanese attack and were in Hawaii after 10DEC41. Two B-17Cs were among the 07DEC41 arrivals, 40-2054 and 40-2063. They joined another B-17C already stationed at Pearl Harbor, 40-2070. B-17Ds were 40-3060, 40-3084, 40-3085, 40-3089, and 40-3090. It is likely that most, if not all of these eight Fortresses were camouflaged in the HAD scheme.
With no written records and few photographs, I turned to scouring newsreels and training films for any glimpses of “shark fin” B-17s in HAD schemes. This effort was both rewarding and at the same time frustrating. Several nice clips, but few identifiable Serials.
A poor quality newsreel, but one which shows a formation of six Hawaiian Air Depot camouflaged Fortresses in flight: https://www.gettyimages.com/detail/video/sun-shining-through-clouds-soldiers-running-toward-and-news-footage/502797943
A section of the same film as above with a slightly better preserved image. If only it were a little sharper!: https://www.gettyimages.com/detail/video/navy-captain-of-ship-holding-a-megaphone-on-ship-bridge-a-news-footage/638937588