When I was little, I thought "navy" meant dark, because "navy blue" was a dark shade of blue. I didn't know what the navy was. So one time, when trying to describe a sort of forest green color, I called it "navy green".
When my uncle (who I was describing the color to) corrected me, I tried to cover up by saying "I knew that, but navy *also* means dark, like Navy Blue." I thought he wouldn't know any better. :P
A childhood belief about speaking

others believed things like this
- when i was little i thought that NAVY SEALS were actual seals that were navy blueAnon
- My sister thought that "Ice, Ice Baby" by Vanilla Ice was actually "US Navy".Anon
- i used to believe that people with blue or green eyes saw that certain color— mellactica
- Eifel 65 - Blue
I'm Blue (if I was green I would die...)
[I'm blue, da ba dee, da ba di.]— Matt - I was born brunette with brown eyes and dark hair, i thought people with blue eyes, had water in them.Anon
- I used to believe the sky was green and everybody was colorblind since they said it was blue— IM COW