My walking trousers were a very light colour: a pale sandy moving into grey. I was dyeing something else brown and chucked them into the wash. Even though they’re 100% polyester, they picked up a surprising amount of colour.
I love them more now that I feel that they’re ‘designed’ for playing in the dirt.
Riotflower's Realm 
I’m the Lorax, I speak for the Trees.