Why didn't the US army make camouflage fatigues the standard battle dress uniform in the 1950's?

I know the USMC and ARMy were experimenting with some camouflage patterns towards the end of World war II. From my understanding the uniform didn't go over well in Europe as it resulted in a lot of friendly fire. However why did the pattern not become standard after the war, to the best of my knowledge most fatigues from 1945-1980 were olive drab or greenexcept for helmet covers and the occasional camouflage uniform issued to the special forces.