* Brown: This is the most common meaning of "marrón". It refers to the color brown.
* Chestnut: This refers to the nut of the chestnut tree, or the tree itself.
* Brownish: This is a less common usage, but it can mean something that has a brown color.
It's important to consider the context of the sentence to determine the most appropriate translation.
For example:
* "El caballo es marrón." This translates to "The horse is brown."
* "Comí castañas marrones." This translates to "I ate brown chestnuts."
* "El cielo está un poco marrón." This translates to "The sky is a bit brownish."