Why were most japanese vans green in the 70s and the 80s?


Hi there my friends. Im originally from sri lanka and was raised there throughout the 2000s and i was a car person as a kid and used to observe cars when i as a kid. In the 2000s sri lanka it was a common site to see 80s and 70s cars with 90s being "fresh" all over the road back then (like how you can see cars from 2005 and 2008 nowadays) and now they're hard to see. While observing, I have noticed many vans and mini vans from 70s and 80s were green alongside colours like khaki/mud colour and i also have noticed that not only sri lanka but in japan as well they were green. Is there any reason why? and is it special?

This is a picture for reference: https://upload.wikimedia.org/wikipedia/commons/e/ec/Toyota_Hiace_%28second_generation%29_D_back.jpg

by supirimalli86