Aircraft insignia of Finnish Air Force from the 20 of March 1934.  According to the colour table in the book "Sotamaalaus, Suomen ilmavoimien historia 23" by Kalevi Keskinen and Kari Stenman (ISBN 951-98751-6-6), the right colour for the blue swastika is Federal Standard 595 FS15123. The colour of the swastika was defined by a order IV BA 2 issued by the FAF 20/03/1934. Order defined also the proportions of the insignia.
Suomen ilmailun pysyväismääräykset (SIA) (Finnish aviation rtanding rules) Order IV BA 2 "Sotilaslentokoneiden kansallisuusmerkki ja sen paikat lentokoneessa" (Military aircraft nationality mark and the place of the plane) from the 20 of March 1934.Finnish VL Humu, Gloster Gamecock