There was a popular series on World War 2 that was done in color. Wikipedia's Entry says the following: World War II In HD Colour is a 13-episode television do
murder-on-the-orient-express
samurai-jack
the-big-sleep
fay-grim
firefly
we-are-what-we-are
grindhouse
aguirre-wrath-of-god
sangam
the-encounter
guillermo-del-toro
nebraska
star-trek-ii-the-wrath-of-khan
spring-breakers
the-king-of-kong
fractured
o-brother-where-art-thou
sons-of-anarchy
days-of-heaven
mackennas-gold
legend-of-the-boneknapper
elf
infinity-chamber
the-lion-guard
ferdinand
halloween-2007
pee-wees-big-adventure
young-indiana-jones
the-dirty-dozen
rambo