I just found out I'm colorblind!
The diagnosis came completely out of the orange!
I just found out I'm colorblind!
The diagnosis came completely out of the orange!
Listen up, you silly goose! The joke is a pun. "Out of the blue" means something unexpected, but here, they swapped "blue" for "orange" 'cause they're talking about colorblindness. Get it? Probably not, you are not too bright.