looking at the right paint to air brush my T-55AM2B,I browse the web and notice all ex WP T-55AM2B use much darker green color.
I contemplate using tamiya black green and little bit NATO green to spray it,or is there any suggestion for alternative color?

I should do the contrary because your paint will get darker during the weathering process especially if you spray some gloss varnish to apply the decals.

Olivier

I tend to use Tamiya Field Grey for my Russian Armor - once the weathering process starts - it'll darken the paint to the "correct" tone. Just my preference.

If You are interested in People's Polish Army green- simply mix yellow and black paint. This way during Iron Curtain right color for tanks and vehicles in military units was produced. Because everybody did it their own way- often shades of green were different.
Regards,
Michal

People's Bulgarian Army:roughly 2 parts Green and 1 part Black were mixed.Quantity of each collor was defined by the respective unit's Deputy Commander-Techical Matters, so as to have common collor for the vehicles of the unit.Eyeballing was the only mean to measure the outcome.As a result there were-more or less- similarly collored tanks within smaller units-platoon,companies.Yet variations within units on higher level-batalion,division- were common.
Tanks were repainted as a rule twice each year(spring-autumn) and after each large scale manoeuvre-so quite often.