The phrase "rust color" refers to the reddish-brown color that is similar to the color of rust, the substance that forms on metal when it is exposed to air and moisture for a long time. Full definition
To be in line with today's trends, enjoy yourself in rust colored skinny jeans! (thevivaluxury.com)
The double coat of this breed is marked with rust coloring over each eye, on their cheeks, under their tails, on the sides of their chest and on each leg. (puppiesndogs.com)
I love the saturated rust color of this oversized cardigan. (bylaurenm.com)