I have a vague memory of a scene about Jethro's shirt being reversible lol

He usually always wears his traditional red checked shirt, but sometimes he wears a blue checked....and maybe other color checked shirts as well like green and black it seems.

BUT it seems like there was a scene in which the Clampetts were going somewhere and Jethro had been working outside and is in his red checked shirt and Jed tells him, "Go change into a clean shirt", and Jethro takes off his shirt, turns it inside out to revel it to be BLUE checked and puts on the same shirt lol to which Jed is like, "Noooooo, boy, go get a CLEAN shirt!"

Does anyone remember anything like that?