From German sources it is revealed that the distinguishing color given to this
particular type of ammunition serves to identify its category and characteristics. The
following document (translation) is reproduced as of interest in this connection.
* * *
Technical Sheets Issued by the Quartermaster General (Air equipment)
Berlin, 29th August, 1941
Subject:--Distinguishing colors of HE bombs.
HE bombs are divided into various groups according to their effect, regardless
of their caliber. Each group has a distinguishing color to facilitate handling
and avoid confusion. This measure can only fulfill its purpose if the
distinguishing colors are known to the units.
As it has been found that these colors are frequently not known, the
meaning of the various colors is given below:
(1) Green--all bombs with purely splinter effect (cement splinter bombs);
(2) Yellow--all mine bombs with the distinguishing letters "SC";*
(3) Red --SD2*, SD50, SD250 and SD500, thick-walled HE bombs (splinter and mine effect);
(4) Blue--all bombs with particularly powerful penetration (armor-piercing bombs);
(5) Yellow with blue stripe--SD 1,700 HE bomb with increased penetration.
The bombs referred to under (1) are painted green all over; the other colors are
painted in stripes on the conical part of the fin assembly.
* SC is the designation for the bomb with a thin casing, which achieves its effect chiefly by blast.
** SD is the designation for the bomb with a thick casing, which achieves its effect
chiefly by fragmentation. The SD has greater penetrating power than the SC, and
was designed for attack on modern reinforced concrete structures.