Brown is a color that has a lot to do with the earth and the outdoors. Brown is terrestrial, adventurous and isn't afraid to get dirty. Brown can also be about age and experience.
Things that are brown include gravel, boulders, canyons, chocolate and rust.
No mountain high and no valley low stops Ernest's pursuit for adventure. Nature is his mother, shaping him into a wise, hearty but modest man who knows how to survive.