RED CROSS SYMBOLS
Relationship to the flag of Switzerland
According to the ICRC, the emblem adopted was formed by reversing the colours of the Swiss flag of Switzerland.[3] This was officially recorded in the 1906 revision of the Convention.
Red Crescent (Ottoman Empire)
Red Crystal
Red Lion with Sun (Iran)
Red Shield of David (Israel)
https:// en.wikipedia.org/wiki/Emblems_of_the_International_Red_Cross_and_Red_Crescent_Movement#Protection_symbols_vs._organizational_emblems