US Navy nose cone colours?

Could anyone explain what the rules were for nose cone colours on Navy jets
during Vietnam?

Is it Squadron Commander, Pacific vs Atlantic, paint available.......

The pictures of F4s, F8s and A7s I've seen shown black and white even on the
same carrier [and the occasional pale yellow].


Thank you in advance for any help

Lee

-- 
It is the bicycle you don't hear that kills you - Amsterdam 2002